Timeline of Church History

The History of the Church is a vital part of the Orthodox Christian faith. Orthodox Christians are defined significantly by their continuity with all those who have gone before, those who first received and preached the truth of Jesus Christ to the world, those who helped to formulate the expression and worship of our faith, and those who continue to move forward in the unchanging yet ever-dynamic Holy Tradition of the Orthodox Church.

New Testament era

• ca. 27 BC - AD 180 Pax Romana.
• ca. 4 BC Christ is born in Bethlehem; 14,000 Holy Innocents slain in Bethlehem.
• ca. 25-26 Death of Joseph the Betrothed.
• ca. 28 John the Baptist begins ministry in the "15th year of Tiberius" (Luke 3:1-2), preaching "Repent, for the kingdom of heaven is near" (Matt 3:1-2), baptized Christ in the Jordan (Mark 1:4-11), is later arrested and beheaded by Herod Antipas, tetrarch of Galilee.
• ca. 28-30 Three year ministry of Jesus Christ, including: Temptation; Appointment of the Twelve Apostles; Sermon on the Mount; Miracles performed; Rejection; Transfiguration; Triumphal Entry into Jerusalem; Driving out the Temple money changers; Cursing the fig tree; Giving the great commandment; Anointing; Mystical Supper; Arrest; Sanhedrin Trial; Before Pilate; Passion; Crucifixion on Good Friday; Entombment by Pharisees Joseph of Arimathea and Nicodemus of the Sanhedrin; Harrowing of Hell; Resurrection on Easter Sunday; Appearances to various people over the next forty days; Giving the Great Commission (Matt. 28:16-20); and Ascension.
• ca. 30 Martyrdom of Stephen the deacon, first Christian martyr.
• 30 Conversion of Apostle Paul on road to Damascus.

Apostolic era (33-100)

• 33 The Holy Spirit descends on the day of Pentecost, filling the followers of Jesus Christ with power from on high.
• 34 Apostle Peter founds See of Antioch.
• 35 The name Christian first used in Antioch.
• 37 Joseph of Arimathea travels to Britain and lands in Glastonbury.
• 40 Apostle Barnabas sent from Jerusalem to Antioch to strengthen community after persecution when church leaders flee city.
• ca.42 Apostle Paul's ecstasy to the third heaven (2 Cor.12:2-4).
• ca.46-48 Apostle Paul's first missionary journey, with Apostle Barnabas (Acts 13 - 14).
• 49 Apostolic Council of Jerusalem rules that Gentiles do not have to become Jews before becoming Christians.
• ca.49-52 Apostle Paul's second missionary journey, with Apostle Silas (Acts 15:39 - 18:22).
• 50 Apostle Matthew finishes the Gospel of Matthew in Aramaic.
• 52 Apostle Thomas arrives in Kerala, introducing Christianity to India.
• ca.53-57 Apostle Paul's third missionary journey (Acts 18:23 - 21:16).
• ca.59-62 Apostle Paul's fourth missionary journey, voyage to Rome (Acts 27 - 28:16).
• 62 Martyrdom of Apostle James the Just; crucifixion of Apostle Andrew in Patras.
• 63 Aristobulus consecrated as first bishop of Britain.
• 64-68 First of ten major persections of the Early Church, under Emperor Nero.
• 66 Flight of the Christian community in Jerusalem to Pella and other places in the Decapolis, and Antioch.
• 67 Martyrdom of the Apostle Peter in Rome; martyrdom of the Apostle Paul in Rome; Apostle Linus elected first bishop of Rome.
• 69 Ignatius of Antioch consecrated bishop of Antioch.
• 70 Apostle Mark writes Gospel; Temple in Jerusalem is destroyed by the Romans; expulsion of the Christians from the synagogues.
• 71 Apostle Mark introduces Christianity to Egypt.
• 80 Gospel of Luke written by the Apostle Luke; Titus dedicates the Colosseum, site of the martyrdom of many early Christians.
• ca. 80-90 Didache written.
• 85 Acts of the Apostles written by Apostle Luke.
• 90 Council of Jamnia (Javneh) marks final separation and distinction between the Jewish and Christian communities, including rejection of the Septuagint widely then in use among the Hellenized Jewish diaspora.
• 95 Apostle John writes Book of Revelation.
• ca.90-96 Persecution of Christians under Emperor Domitian (2nd).
• 96 Gospel of John written by Apostle John as supplement and further theological illumination of the Synoptic gospels.
• ca.100 Emergence of Christian Catacombs in the second century.
• 100 Death of Apostle John.

Ante-Nicene era (100-325)

• 107 Martyrdom of Ignatius of Antioch; death of Apostle Symeon.
• 108-124 Persecution under Emperor Trajan, continuing under Emepror Hadrian (3rd).
• 120 Beginning of time of the Apologists: Justin Martyr, Aristides, Tatian, Athenagoras of Athens, Theophilus, Minucius Felix, Tertullian and Quadratus, writing to defend the Church against internal heresies, and to defend the faith before the Jews, and before the larger pagan world, using Greek philosophic concepts and terms.
• 124 Apostles Quadratus and Aristides present Christian apologies to Emperor Hadrian at Athens.
• 128 Aquila's Greek translation of the Old Testament.
• 130 Conversion of Justin Martyr.
• 132 Jews, led by Bar Kochba, whom some identify as the Messiah, revolt against Rome.
• 135 Christmas instituted as a feast day in Rome.
• 136 Emperor Hadrian crushes Jewish resistance, forbids Jews from returning Jerusalem, and changes city name to Aelia Capitolina; first recorded use of title Pope for the bishop of Rome by Pope Hyginus.
• 144 Excommunication of Marcion for his heretical rejection of the Old Testament and for his semi-Gnostic teachings, particularly Docetism.
• 150 Justin Martyr describes Divine Liturgy.
• 155 Martyrdom of Polycarp of Smyrna.
• 156 Beginning of Montanism.
• 165 Martyrdom of Justin.
• 166 Pope Soter inaugurates in Rome a separate annual feast for Pascha, in addition to the weekly Sunday celebrations of the Resurrection, which is also held on a Sunday, in contrast to the Quartodecimans.
• ca. 175 Tatian’s Diatessaron harmonizes the four canonical gospels into single narrative.
• 177-180 Persection under Emperor Marcus Aurelius (161-180) (4th).
• 180 Irenaeus of Lyons writes Against Heresies; Saint Dyfan first martyr in British Isles (at Merthyr Dyfan, Wales).
• 180-192 Theodotion's Greek translation of the Old Testament.
• 193-211 Symmachus' Greek translation of the Old Testament.
• 197 Quartodeciman controversy.
• 200 Martyrdom of Irenaeus of Lyons.
• 202 Emperor Septimus Severus issues edict against Christianity and Judaism; Martyrdom of Haralampus of Magnesia.
• 202-210 Persecution under Emperor Septimius Severus (193-211) (5th).
• 206 King Abgar IX converts Edessa to Christianity.
• ca. 209 Martyrdom of Alban in Britain.
• 210 Hippolytus of Rome, bishop and martyr and last of Greek-speaking fathers in Rome, writes Refutation of All Heresies (Philosophumena), and Apostolic Tradition, the latter containing the earliest known description of the rite of ordination.
• 215 Conversion of Tertullian to Montanism.
• 225 Death of Tertullian.
• ca.225-250 Didascalia Apostolorum, "Teaching of the Apostles", oldest extant manual of church order describes church life at that time; circulated widely in Persia, being translated early on from Greek into Syriac.
• 227 Origen begins Commentary on Genesis, completes work on First Principles.
• 235-238 Persecution under Emperor Maximinus Thrax (6th); martyrdom of St. Hippolytus of Rome.
• 238 During reigns of Gordian and Philip the Arab the church proclaims the faith openly and increasingly attracts well-educated converts.
• ca.240 Origen's Hexapla of the Old Testament, largest critical production of antiquity.
• 244 Plotinus founds Neoplatonist school in Rome, whose system is developed in conscious opposition to Christianity, however whose teachings indirectly influenced Augustine of Hippo and Pseudo-Dionysius the Areopagite and hence medieval theologians and mystics.
• 246 Paul of Thebes retreats to the Egyptian desert and becomes first Christian hermit.
• 247 Rome celebrated its thousandth anniversary this year, witnessing a period of increased persecution of Christians.
• 248 Origen writes in Against Celsus that the Roman empire is a Divine Will.
• 249-251 Persecution under Emperor Decius (7th).
• 257-260 Persecution under Emperor Valerian (253-260) (8th).
• 258 Bp. Cyprian of Carthage martyred.
• 260 Paul of Samosata begins his heretical preaching against the divinity of Christ; Synod in Rome condemns Sabellianism and Subordinationism.
• 264 Excommunication of Paul of Samosata.
• 265 The word "Homoousios", "of the same substance", to define relationship between Father and Son, used for first time by Modalist Monarchians of Cyrene, playing an important part in defining Orthodoxy at Nicene Council in 325.
• 274-275 Persecution under Emperor Aurelian (9th).
• 270 Death of Gregory Thaumaturgus; Porphyry of Tyre writes Against the Christians, a powerful anti-Christian book, causing several Christian contemporaries to try and refute him, and which was later banned and burned in 448.
• 284 Diocletian becomes Roman emperor, persecutes Church and martyrs an estimated one million Christians; martyrdom of Cosmas and Damian, Andrew Stratelates ("the General") and 2,593 soldiers with him in Cilicia.
• 285 Anthony the Great flees to the desert to pursue a life of prayer.
• 300 By this date, the Chrisitan population is about 6,200,000, or 10.5% of the population of the Roman Empire (based on population of 60 million).
• 301 Gregory the Illuminator converts King Tiridates I of Armenia to the Christian faith.
• 302 20,000 Martyrs burned at Nicomedia.
• 303 Outbreak of the Great Persecution (303-311) (10th), as Diocletian and Galerius launch the last and most severe persecution of Christians in the Roman Empire; martyrdom of George the Trophy-bearer.
• ca.305-311 Lactantius writes Divinae Institutiones, the first systematic Latin account of the Christian view of life.
• ca.306 Synod of Elvira in Spain, requires continence of all clergy, and severe disciplinary penalties for apostasy and adultery, becoming the pattern in the west.
• 308 Pope Marcellus, a rigorist, opposes more lenient treatment of the Christians who had lapsed under the recent persecution.
• 310 Armenia becomes first Christian nation; persecution of Christians under Persian King Shapur II (310-379).
• 311 Galerius issues Edict of Toleration ending persecution of Christians in his part of the Roman Empire; rebellion of the Donatists in Carthage.
• 312 Vision and conversion of Constantine the Great; defeat of Maxentius at the Battle of Milvian Bridge, making Constantine Emperor of the West; martyrdom of Lucian of Antioch, who had completed a recension of the Septuagint and the Four Gospels in Greek, and inspired the development of the School of Antioch and Biblical textual study.
• 313 Edict of Milan issued by Constantine the Great and co-emperor Licinius, officially declaring religious freedom in the Roman Empire, specifically naming religious toleration for Christianity, restoration of property to Christian churches, and legal recognition.
• 314 Council of Ancyra held; Council of Arles condemns Donatism.
• 315 Council of Neo-Caesaria held.
• 318 Publication of On the Incarnation by Athanasius the Great, influencing the condemnation of Arianism; beginnings of Arian Controversy.
• 318 Pachomius the Great, disciple of Anthony the Great, organizes a community of ascetics at Tabennis in Egypt, founding cenobitic monasticism.
• 320 Expulsion of Arius by Alexander of Alexandria; martyrdom of Forty Martyrs of Sebaste.
• 320-21 Licinius' measures against Christians in the east enforced.
• 321 Constantine declares Sunday a holiday in honor of the Resurrection.
• 323 Constantine the Great builds church on the site of the martyrdom of Peter in Rome.
• 324 Constantine defeats Licinius and becomes sole emperor.

Nicene era (325-451)

• 325 First Ecumenical Council held in Nicea, condemning Arianism, setting the Paschalion, and issuing the first version of the Nicene Creed.
• 326 Discovery of the True Cross by the Empress Helena; King Miraeus of Georgia becomes Christian.
• 328 Athanasius the Great becomes bishop of Alexandria (328-373).
• 329 Athanasius ordains Frumentius (Abba Selama) to priesthood and commissions him to evangelize Ethiopia.
• 330 Constantinople is founded as New Rome and Christian capital of the Roman Empire; Amoun and Macarius the Great found monasteries in the Egyptian desert.
• 336-338 Athanasius the Great goes into exile in Treves, telling Europeans about the monastic rule of Pachomius the Great, awakening interest in monasticism in Europe.
• 337 Death of Constantine.
• 340 Conversion of Wulfila to Arianism, subsequently missionizing the Goths with heretical doctrine.
• 341 Council of Antioch held; Emperor Constans bans pagan sacrifices and magic rituals under penalty of death.
• 345 Death of Nicholas, Archbishop of Myra in Lycia.
• 348 Death of Pachomius the Great; death of Spyridon of Trimythous.
• 350 Ninian establishes the church Candida Casa at Whithorn in Galloway, Scotland, beginning the missionary effort to the Picts.
• 351 Apparition of the Sign of the Cross over Jerusalem.
• 355 Death of Nina, Enlightener of Georgia.
• 356 Death of Anthony the Great.
• 357 The Council of Sirmium, the high point of Arianism, issues the Blasphemy of Sirmium.
• 358 Basil the Great founds monastery of Annesos in Pontus, the model for Eastern monasticism.
• 359 Councils of Seleucia in the east and Rimini in the west.
• 360 Martin of Tours founds first French monastery at Liguge; first church of Hagia Sophia inaugurated by Emperor Constantius II.
• 362 Antiochian schism (362-414).
• 361-63 Julian the Apostate becomes Roman emperor, attempting to restore paganism.
• 363 Emperor Jovian reestablished Christianity as the official religion of the Empire.
• 364 Council of Laodicea held.
• 367 Athanasius of Alexandria writes his Paschal letter, listing for the first time the canon of the New Testament of the Holy Scriptures, including all 27 New Testament Books; death of Hilary of Poitiers.
• 373 Death of Athanasius the Great; death of Ephrem the Syrian.
• 374 Election of Ambrose as bishop of Milan.
• 375 Basil the Great writes On the Holy Spirit, confirming the divinity of the Holy Spirit.
• 376 Visigoths convert to Arian Christianity.
• 379 Death of Basil the Great; Emperor Gratian's rescript Ordinariorum Sententias extends power of Bishop of Rome by allowing him authority over bishops within his own jurisdiction.
• 380 Christianity established as the official faith of the Roman Empire by Emperor Theodosius the Great; Council of Saragossa condemns Priscillianism.
• 381 Second Ecumenical Council held in Constantinople, condemning Macedonianism/Pneumatomachianism and Appollinarianism, declaring the divinity of the Holy Spirit, confirming the previous Ecumenical Council, and completing the Nicene-Constantinopolitan Creed; Council of Aquileia led by Ambrose of Milan deposes Arian bishops.
• 382 Pope Siricius of Rome first to bear title Pontifex Maximus.
• 384 Council of Bordeaux condemns Priscillian.
• 385 Death of Gregory of Nyssa.
• 386 Death of Cyril of Jerusalem.
• 387 Augustine baptized at Pascha by Ambrose of Milan.
• 391 Death of Gregory the Theologian.
• 391-92 All non-Christian temples in the Empire closed; Theodosius the Great ends pagan Eleusinian Mysteries by decree and causes surviving pagan sacrifices at Alexandria and Rome to cease.
• 392 Death of Macarius the Great.
• 393 Council of Hippo publishes Biblical canon; Emperor Theodosius bans Olympic Games as a pagan festival.
• 394 Epiphanius of Salamis attacks teachings of Origen as heretical; Council of Constantinople held; Donatist Council of Bagai in Africa held with 310 bishops.
• 395 Augustine becomes bishop of Hippo in North Africa; the placing of the cincture (sash) of the Most Holy Theotokos in the Church of the Virgin in Halkoprateia-Constantinople (395-408).
• 395 Re-division of Empire with death of Emperor Theodosius the Great.
• 397 Council of Carthage publishes Biblical canon; death of Martin of Tours; death of Ambrose of Milan.
• 398 John Chrysostom becomes Archbishop of Constantinople.
• ca. 398 Martyrdom of 10,000 Fathers of the Scetis by Patriarch Theophilus of Alexandria.
• 399 Anastasius of Rome and other bishops condemn doctrine of Origen.
• 401 Augustine of Hippo writes Confessions; Pope Innocent I of Rome supports John Chrysostom and condemns pelagianism.
• 402 Porphyry of Gaza obtains imperial decree ordering closing of pagan temples in Gaza.
• 403 Abduction of Patrick to Ireland to serve as a slave; visit of Victricius of Rouen to Britain; Synod of the Oak held near Chalcedon, deposing and exiling John Chrysostom.
• 404 Martyrdom of Telemachus, resulting in Emperor Honorius' edict banning gladiator fights.
• 405 Translation of Holy Scriptures into Latin as the Vulgate by Jerome.
• 407 Death of John Chrysostom in exile.
• 410 Fall of Rome to the Visigoths under Alaric I; escape of Patrick back to Britain; Emperor Honorius tells Britain to attend to its own affairs, effectively removing the Roman presence.
• 410 Council of Seleucia declares Mesopotamian Nestorian bishops independent of Orthodox bishops.
• 411 Pelagius condemned at council in Carthage; Rabbula becomes bishop of Edessa.
• 412 Cyril succeeds his uncle Theophilus as Pope of Alexandria; Honorius outlaws Donatism; Lazarus, bishop of Aix-en-Provence, and Herod, bishop of Arles, expelled from sees on a charge of Manichaeism; Alexandrian Creation Era date finalized at 25 March, 5493 BC.
• 414 Resolution of the Antiochian division.
• 415 Pelagius cleared at a synod in Jerusalem and a provincial synod in Diospolis (Lydda); John Cassian founds convent at Marseilles.
• 416 Councils in Carthage and Milevis condemn Pelagius and convince Pope Innocent I of Rome to excommunicate him.
• 418 Foundation of the Arian Visigothic Kingdom, as Emperor Honorius rewards Visigoth federates by giving them land in Gallia Aquitania on which to settle.
• 418-24 Council in Carthage anathematizes Pelagianism by way of endorsing Augustinian anthropology.
• 426 Augustine of Hippo writes The City of God.
• 428 Nestorius becomes patriarch of Constantinople.
• 429 Pope Celestine I dispatches prominent Gallo-Roman Bishops Germanus of Auxerre and Lupus of Troyes to Britain as missionary bishops and to combat the Pelagian heresy; death of Sisoes the Great.
• 430 Peter the Iberian founds Georgian monastery near Bethlehem.
• 431 Third Ecumenical Council held in Ephesus, condemning Nestorianism and Pelagianism, confirming the use of the term Theotokos to refer to the Virgin Mary, and confirming autocephaly of Church of Cyprus; Pope Celestine sends Palladius to Ireland.
• 432 Return of Patrick to Ireland to begin missionary work; death of Ninian, Apostle to the Picts.
• 433 Formulary of Peace completes the work of the Third Ecumenical Council by reconciling Cyril of Alexandria with John of Antioch.
• 435 Death of John Cassian; death of Acacius of Melitene; Nestorius exiled by Imperial edict to a monastery in a Sahara oasis.
• 438 Codex Theodosianus published.
• 439 Carthage falls to Vandals.
• 444 Death of Cyril of Alexandria; Pope Leo the Great abolishes Gallican vicariate.
• 445 Founding of monastery at Armagh in northern Ireland; Emperor Valentinian III issues decree recognizing primacy of the bishop of Rome.
• 447 Earthquake in Constantinople, when a boy was lifted up to heaven and heard the Trisagion.
• 449 Robber Synod of Ephesus, presided over by Dioscorus of Alexandria, with an order from the emperor to acquit Eutyches the Monophysite.
• 450 First monasteries established in Wales; death of Peter Chrysologus.

Byzantine era (451-843)

• 451 Fourth Ecumenical Council meets at Chalcedon, condemning Eutychianism and Monophysitism, affirming doctrine of two perfect and indivisible but distinct natures in Christ, and recognizing Church of Jerusalem as patriarchate.
• 452 Proterios of Alexandria convenes synod in Alexandria to reconcile Chalcedonians and non-Chalcedonians; second finding of the Head of John the Forerunner.
• 455 Vandals under Gaiseric sack Rome.
• 457 Victorius of Aquitania computes new Paschalion; first coronation of Byzantine Emperor by patriarch of Constantinople.
• 459 Death of Symeon the Stylite.
• 461 Death of Leo the Great; death of Patrick of Ireland.
• 462 Indiction moved to September 1; Studion Monastery founded.
• 466 Church of Antioch elevates bishop of Mtskheta to rank of Catholicos of Kartli, rendering the Church of Georgia autocephalous.
• ca.471 Patriarch Acacius of Constantinople was first called "Oikoumenikos" (Ecumenical).
• 473 Death of Euthymius the Great.
• 475 Emperor Basiliscus issues circular letter to the bishops of his empire, supporting Monophysite Christological position.
• 477 Timothy Aelurus of Alexandria exiles Chalcedonian bishops from Egypt.
• 482 Byzantine emperor Zeno I issues Henotikon in an attempt to reconcile the differences over the Christology of Chalcedon.
• 484 Acacian Schism.
• 484 Founding of Mar Sabbas Monastery by Sabbas the Sanctified; Synod of Beth Lapat in Persia declares Nestorianism as official theology of Assyrian Church of the East, effectively separating the Assyrian church from the Byzantine church.
• 489 Emperor Zeno I closes Nestorian academy in Edessa, which was then transferred under Sassanian Persian auspices to Nisibis, becoming the spiritual center of the Assyrian Church of the East.
• 490 Brigid of Kildaire founds monastery of Kildare in Ireland.
• 494 Pope Gelasius I of Rome delineates relationship between church and state in his letter Duo sunt, written to Emperor Anastasius I.
• 496 Bp. Remigius of Rheims baptizes Franks into Orthodox Christianity.
• ca. 500 Pseudo-Dionysius the Areopagite writes The Mystical Theology.
• 506 Church of Armenia separates from Chalcedonian Orthodoxy.
• 507 Clovis I defeats the Arian Visigoths at Battle of Vouillé near Poitiers, ending their power in Gaul.
• 518 Severus of Antioch deposed by Emperor Justin I for Monophysitism; Patriarch John II of Constantinople is addressed as "Oikoumenikos Patriarches" (Ecumenical Patriarch).
• 519 Eastern and Western churches reconciled with end of Acacian Schism.
• 521 Birth of Columba of Iona.
• 527 Dionysius Exiguus calculates the date of birth of Jesus incorrectly; foundation of St. Catherine's Monastery on the Sinai peninsula by Justinian the Great.
• 529 Pagan University of Athens closed and replaced by Christian university in Constantinople; Benedict of Nursia founds monastery of Monte Cassino and codifies Western monasticism; Council of Orange condemns Pelagianism; death of Theodosius the Great.
• 529-534 Justinian's Corpus Juris Civilis issued.
• 530 Brendan the Navigator lands in Newfoundland, Canada, establishing a short-lived community of Irish monks.
• 532 Justinian the Great orders building of Hagia Sophia; death of Sabbas the Sanctified.
• 533 Mercurius elected Pope of Rome and takes the name of John II, the first pope to change his name upon election.
• 534 Roman Empire destroys the Arian kingdom of Vandals; Malta becomes Byzantine province.
• 536 Mennas of Constantinople summons a synod anathematizing Severus of Antioch.
• 537 Construction of Hagia Sophia in Constantinople completed.
• 539 Ravenna becomes exarchate of the Byzantine Empire.
• 541 Jacob Baradeus organizes the Non-Chalcedonian Church in western Syria (the "Jacobites"), which spreads to Armenia and Egypt.
• 543 Doctrine of apokatastasis condemned by Synod of Constantinople.
• 544 Jacob Baradeus consecrates Sergius of Tella as bishop of Antioch, opening the lasting schism between the Syriac Orthodox Church and the Chalcedonian Church of Antioch; founding of the monastery at Clonmacnoise in Ireland by Ciaran.
• 545 Saint David of Wales moved the Primatial See of Britain from Caerleon to Menevia (St. Davids's).
• 546 Columba founds monastery of Derry in Ireland.
• 547 Saint David of Wales does obeisance to the Patriarch of Jerusalem.
• 553 Fifth Ecumenical Council held in Constantinople in an attempt to reconcile Chalcedonians with non-Chalcedonians—the Three Chapters of Theodore of Mopsuestia, Theodoret of Cyrrhus, and Ibas of Edessa are condemned for their Nestorianism, and Origen and his writings are also condemned.
• 553 Bishops of Aquileia, Milan, Venetia and the Istrian peninsula in Italy all refuse to condemn the Three Chapters, causing Schism of the Three Chapters in those areas, leading to independence of Patriarch of Venice from Patriarch of Aquileia; Ostrogoth kingdom conquered by the Byzantines after the Battle of Mons Lactarius.
• 554 Church of Armenia officially breaks with the West in 554, during the second Council of Dvin where the dyophysite formula of Chalcedon was rejected.
• 556 Columba founds monastery of Durrow in Ireland; death of Roman the Melodist.
• 557 Brendan the Navigator founds monastery at Clonfert, Ireland.
• 563 Columba arrives on Iona and establishes monastery there, founding mission to the Picts.
• 569 Final schism between Chalcedonians and non-Chalcedonians in Egypt; David of Wales holds Synod of Victoria to re-assert the anti-Pelagian decrees of Brefi.
• 579 400 Martyrs slain by Lombards in Sicily.
• 580 Monte Cassino sacked by Lombards, sending its monks fleeing to Rome; Slavs begin to migrate into the Balkans and Greece.
• 587 Visigoth King Reccared renounces Arianism in favor of Orthodoxy.
• 589 Council of Toledo adds Filioque to Nicene-Constantinopolitan Creed in an attempt to combat Arianism.
• 590 Columbanus founds monasteries in France.
• 593 Anastasius the Sinaite restored as Orthodox Patriarch of Antioch.
• 596 Gregory the Dialogist sends Augustine along with forty other monks to southern Britain to convert pagans.
• 597 Death of Columba of Iona.
• 598 Glastonbury Abbey founded - the Church in the British Isles numbers 120 bishops, hundreds of monasteries and parishes organized under a Primate with his See at Menevia.
• ca. 600 The Ladder of Divine Ascent written by John Climacus; Gregory the Dialogist inspires development of Gregorian Chant through his liturgical reforms.
• 601 Augustine of Canterbury converts King Ethelbert of Kent and establishes see of Canterbury.
• 602 Augustine of Canterbury meets with Welsh bishops to bring them under Canterbury.
• 604 Mellitus becomes first bishop of London and founds first St. Paul's Cathedral; death of Gregory the Dialogist.
• 605 Death of Augustine of Canterbury.
• 610 Heraclius changes official language of the Empire from Latin to Greek, already the lingua franca of the vast majority of the population.
• 612 Holy Sponge and Holy Lance brought to Constantinople from Palestine.
• 614 Persians sack Jerusalem under Chosroes II of Persia; Church of the Holy Sepulchre damaged by fire, True Cross captured, and over 65,000 Christians in Jerusalem massacred.
• 615 Death of Columbanus in Italy.
• 617 Persian Army conquers Chalcedon after a long siege.
• 626 Akathist Hymn to the Virgin Mary written, after Constantinople liberated from a siege of 80,000 Avars, Slavs and the Persian fleet.
• 627 Emperor Heraclius decisively defeats Sassanid Persians at Battle of Nineveh, recovering True Cross and breaking power of the Sassanid dynasty.
• 630 Second Elevation of the Holy Cross.
• 633 Death of Modestus of Jerusalem.
• 635 Founding of Lindisfarne Monastery by Aidan, a monk from Iona; Cynegils, king of Wessex, converts to Christianity.
• 636 Capture of Jerusalem by Muslim Arabs after Battle of Yarmuk.
• 640 Muslim conquest of Syria; Battle of Heliopolis between Arab Muslim armies and Byzantium opens door for Muslim conquest of Byzantine Exarchate of Africa.
• 641 Capture of Alexandria by Muslim Arabs.
• 642 Muslim conquest of Egypt.
• 646 Alexandria recaptured by Muslim Arabs after a Byzantine attempt to retake Egypt fails, ending nearly ten centuries of Greco-Roman civilization in Egypt.
• 648 Pope Theodore I of Rome excommunicates patriarch Paul II of Constantinople.
• 649 Arabs invade and conquer Cyprus.
• 650 Final defeat of Arianism as Lombards convert to Orthodox Christianity.
• 653 Pope Martin the Confessor arrested on orders of Byzantine Emperor Constans II.
• 654 Invasion of Rhodes by Arabs.
• 655 Martyrdom of Martin the Confessor.
• 657 Founding of Whitby Abbey in Yorkshire, England.
• 662 Death of Maximus the Confessor.
• 663 Emperor Constans II is last Eastern emperor to set foot in Rome; Constans II declares the Pope of Rome to have no jurisdiction over the Archbishop of Ravenna, since that city was the seat of the exarch, his immediate representative.
• 664 Synod of Whitby held in northern England, adopting Roman calendar and tonsures in Northumbria; Ionian monk Wilfrid appointed as Archbishop of York.
• 669-78 First Arab siege of Constantinople; at Battle of Syllaeum Arab fleet destroyed by Byzantines through use of Greek Fire, ending immediate Arab threat to eastern Europe.
• 670 Composition of Caedmon's Hymn by Caedmon of Whitby.
• 672 The First Synod of Hertford called by Theodore of Tarsus, adoption of ten decrees paralleling the canons of the Council of Chalcedon.
• 673 The Second Council of Hatfield upholds Orthodoxy against Monothelitism.
• 680-681 Sixth Ecumenical Council held in Constantinople, condemning Monothelitism and affirming Christology of Maximus the Confessor, affirming that Christ has both a human will and a divine will; Patr. Sergius of Constantinople and Pope Honorius of Rome are both explicitly anathematized for their support of Monothelitism.
• 682 Foundation of Monkwearmouth-Jarrow Abbey in England.
• 685 First monastics come to Mount Athos; death of Anastasius of Sinai.
• 685 John Maron elected first Maronite Patriarch, becoming the founder of what is known today as the Maronite Catholic Church, which embraced Monothelitism, rejected the teaching of the Fifth Ecumenical Council, and separated from the Orthodox Church.
• 687 Destruction of Whitby Abbey by Danish raiders; death of Cuthbert of Lindisfarne.
• 688 Emperor Justinian II and Caliph al-Malik sign treaty neutralizing Cyprus.
• 690c. The Witenagamot of England forbade appeals from the Local Church to the Patriarch of Rome.
• 691 Dome of the Rock completed in Jerusalem.
• 692 Quinisext Council (also called the Penthekte Council or Council in Trullo) held in Constantinople, issuing canons which are seen as completing the work of the Fifth and Sixth Ecumenical Councils, and declaring the Church of Jerusalem to be a patriarchate.
• 694 Byzantine army of Justinian II defeated by Maronites, who became fully independent afterwards.
• 697 Council of Birr accepts Roman Paschalion for northern Ireland; at this synod, Adomnán of Iona promulgates his Cáin Adomnáin.
• 698 Muslim conquest of Carthage; at Synod of Aquileia, bishops of the diocese of Aquileia end the Schism of the Three Chapters and return to communion with Rome.
• ca. 700 Death of Isaac of Syria.
• 707 Byzantines lose Balearic Islands to Moors; death of John Maron.
• 710 Pope Constantine makes last papal visit to Constantinople before 1967.
• 711 Umayyad Islamic invasion of Spain.
• 712 Death of Andrew of Crete.
• ca. 715 Lindisfarne Gospels produced in Northumbria (Northern England).
• 715 Grand Mosque of Damascus built over the Cathedral of St. John the Baptist; Al-Aqsa Mosque constructed over site of Church of St. Mary of Justinian; Pictish King Nechtan invites Northumbrian clergy to establish Christianity amongst the Picts.
• 716 Monastery at Iona conforms to Roman liturgical usage; Boniface's first missionary journey to Frisia.
• 717 Pictish king Nechtan expels monks from Iona.
• 717-18 Second Arab siege of Constantinople.
• 719 Nubian Christians transfer allegiance from Chalcedonian church to Coptic church.
• 723 Boniface fells Thor's Oak near Fritzlar.
• 726 Iconoclast Emperor Leo the Isaurian starts campaign against icons.
• 730 Emperor Leo the Isaurian orders destruction of all icons, beginning the First Iconoclastic Period.
• 731 Bede completes Ecclesiastical History of the English People.
• 732 Muslim invasion of Europe stopped by Franks at Battle of Tours, establishing a balance of power between Western Europe, Islam and the Byzantine Empire.
• 733 Byzantine Emperor Leo the Isaurian withdraws the Balkans, Sicily and Calabria from the jurisdiction of the Pope in response to Pope Gregory III of Rome's support of a revolt in Italy against iconoclasm.
• 734 Egbert becomes bishop of York, founding a library and making the city a renowned centre of learning.
• 735 Death of Bede; See of York achieves archepiscopal status.
• 739 Emperor Leo III (717-41) publishes his Ecloga , designed to introduce Christian principle into law; death of Willibrord.
• 742 After a forty-year vacancy, Stephen IV becomes Orthodox Patriarch of Antioch, at the suggestion of Umayyad caliph Hisham ibn Abd al-Malik.
• 746 Byzantine forces regain Cyprus from the Arabs.
• 747 The Witenagamot of England again forbids appeals to the Roman Patriarch ; Council of Clovesho I adopts Roman calendar, observance of the feasts of St. Gregory the Great and Augustine of Canterbury, and adopts the Rogation Days.
• 749 Death of John of Damascus.
• 750 Donation of Constantine accepted as a legitimate document, used by Pope Stephen II to prove territorial and jurisdictional claims.
• 751 Lombard king Aistulf captures Ravenna and the Romagna, ending Byzantine Exarchate of Ravenna.
• 752 Death of Pope Zacharias of Rome.
• 754 Iconoclastic Council held in Constantinople under the authority of Emperor Constantine V Copronymus, condemning icons and declaring itself to be the Seventh Ecumenical Council; Constantine begins dissolution of the monasteries.
• 754 Death of Boniface.
• 756 Donation of Pepin cedes lands including Ravenna that became basis of Papal States.
• 768 Wales adopts Orthodox Paschalion and other decrees of the Synod of Whitby at teaching of Elfoddw of Gwynedd.
• 769 Pope Stephen III of Rome holds a council changing papal election procedure and confirming veneration of icons.
• 772 Charlemagne starts fighting Saxons and Frisians; Saxony is subdued and converted to Christianity.
• 781 King Charlemagne of the Franks summons Alcuin of York to head palace school at Aachen (Aix-la-Chapelle) to inspire revival of education in Europe.
• 785 The Synod of Cealchythe erects the Archbishopric of Lichfield.
• 787 Seventh Ecumenical Council held in Nicea, condemning iconoclasm and affirming veneration of icons; two councils held in England, one in the north at Pincanhale, and the other in the south at Chelsea, reaffirming the faith of the first Six Ecumenical Councils (the decrees of the Seventh having not yet been received), and establishing a third archbishopric at Lichfield.
• 792 The Synod of Regensburg condemned Adoptionism.
• 793 Sack of Lindisfarne Priory, beginning Viking attacks on England.
• 794 Charlemagne convenes council in Frankfurt-in-Main, rejecting decrees of Seventh Ecumenical Council and inserting Filioque into Nicene-Constantinopolitan Creed.
• 800 Charlemagne crowned as Holy Roman Emperor by Leo III of Rome on Christmas day, marking the break of Frankish civilisation away from the Orthodox Christian Roman Empire; Book of Kells produced in Ireland.
• 800 Ambassadors of Caliph Harunu al-Rashid give keys to the Holy Sepulchre to Charlemagne, acknowledging some Frankish control over the interests of Christians in Jerusalem ; establishment of the Western Rite Monastery of Saint Mary in Jerusalem.
• 801 Controversy in Jerusalem over Frankish pilgrims using Filioque.
• 803 Council of Clovesho II abolishes archbishopric of Lichfield, restoring the pattern of the two metropolitan archbishoprics (Canterbury and York) which had prevailed before 787, and requires the use of the Western Rite amongst the English speaking peoples.
• 810 Pope Leo III refused permission for the Filioque to be inserted in the Creed.
• 814 Conflict erupts between Emperor Leo V and Patr. Nicephorus on the subject of iconoclasm; Leo deposes Nicephorus, Nicephorus excommunicates Leo.
• 824 Byzantine Crete falls to Arab insurgents fleeing from the Umayyad Emir of Cordoba Al-Hakam I, establishing an emirate on the island until the Byzantine reconquest in 960.
• 826 Ansgar arrives in Denmark and begins preaching; King Harald Klak of Denmark converts to Christianity.
• 828 Death of Patr. Nicephorus I of Constantinople.
• ca. 829-842 Icon of the Panagia Portaitissa appears on Mount Athos near Iviron Monastery.
• 836 Death of Theodore the Studite.
• ca. 839 First Rus'-Byzantine War, where the Rus attacked Propontis (probably aiming for Constantinople) before turning east and raiding Paphlagonia.

Late Byzantine era (843-1453)

• 843 Triumph of Orthodoxy occurs on first Sunday of Great Lent, restoring icons to churches.
• 850 Third Finding of the head of John the Forerunner.
• 852 Ansgar founds churches at Hedeby and Ribe in Denmark.
• 858 Photius the Great becomes patriarch of Constantinople.
• ca. 860 Christianization of the Rus' Khaganate.
• 861 Cyril and Methodius depart from Constantinople to missionize the Slavs; Council of Constantinople attended by 318 fathers and presided over by papal legates confirms Photius the Great as patriarch and passes 17 canons.
• 862 Rastislav of Moravia converts to Christianity.
• 863 First translations of Biblical and liturgical texts into Church Slavonic by Cyril and Methodius.
• 863 Venetians steal relics of Apostle Mark from Alexandria.
• 864 Baptism of Prince Boris of Bulgaria; Synaxis of the Theotokos in Miasena in memory of the return of her icon.
• 865 Bulgaria under Khan Boris I converts to Orthodox Christianity.
• 866 Vikings raid and capture York in England.
• 867 Council in Constantinople held, presided over by Photius, which anathematizes Pope Nicholas I of Rome for his attacks on work of Greek missionaries in Bulgaria and use by papal missionaries of Filioque; Pope Nicholas dies before hearing news of excommunication; Basil the Macedonian has Emperor Michael III murdered and usurps Imperial throne, reinstating Ignatius as patriarch of Constantinople.
• 867 Death of Kassiani, Greek-Byzantine poet and hymnographer, who composed the Hymn of Kassiani, chanted during Holy Week on Holy Wednesday.
• 869-870 Robber Council of 869-870 held, deposing Photius the Great from the Constantinopolitan see and putting the rival claimant Ignatius on the throne, declaring itself to be the "Eighth Ecumenical Council."
• 870 Conversion of Serbia; death of Rastislav of Moravia; martyrdom of Edmund, King of East Anglia.
• 877 Death of Ignatius I of Constantinople, who appoints Photius to succeed him.
• 878 King Alfred the Great of Wessex defeats Vikings; the Treaty of Wedmore divides England between the Anglo-Saxons and the Danes (the Danelaw).
• 879-880 Eighth Ecumenical Council held in Constantinople attended by 383 fathers passing 3 canons, confirms Photius as Patriarch of Constantinople, anathematizes additions to the Nicene-Constantinopolitan Creed, and declares that the prerogatives and jurisdiction of the Roman pope and the Constantinopolitan patriarch are essentially equal; the council is reluctantly accepted by Pope John VIII of Rome.
• 885 Mount Athos gains political autonomy.
• 885 Death of Methodius.
• 886 Glagolitic alphabet, (now called Old Church Slavonic) adopted in Bulgarian Empire; St Alfred the Great, King of Wessex, captures London from the Danes.
• 910 Benedictine Abbey of Cluny founded in France.
• 899 Death of Alfred the Great.
• 911 Holy Protection of the Virgin Mary.
• 912 Normans become Christian; Nicholas I Mysticus becomes Patriarch of Constantinople.
• 927 Church of Bulgaria recognized as autocephalous by Constantinople.
• 931 Abbott Odo of Cluny reforms monasteries in Aquitaine, northern France, and Italy, starting the Cluniac Reform movement within the Benedictine order, focused on restoring the traditional monastic life, encouraging art and caring for the poor.
• 935 Martyrdom of Wenceslaus, prince of the Czechs.
• 944 City of Edessa recovered by Byzantine army, including Icon Not Made By Hands.
• 945 Dunstan becomes Abbot of Glastonbury.
• 957 Olga of Kiev baptized in Constantinople.
• 960 Emperor Nicephorus II Phocas re-captures Crete for Byzantines; Dunstan becomes Archbishop of Canterbury, reforming monasteries and enforcing rule of Benedict.
• 962 Denmark becomes Christian nation with baptism of King Harald Blaatand ("Bluetooth"); Holy Roman Empire formed, with Pope John XII crowning Otto I the Great Holy Roman Emperor.
• 963 Athanasius of Athos establishes first major monastery on Mount Athos, the Great Lavra.
• 965 Emperor Nicephorus II Phocas gains Cyprus completely for the Byzantines.
• 969 Death of Olga of Kiev; Emperor Nikephoros II Phokas captures Antioch and Aleppo from Arabs.
• 972 Emperor John I Tzimiskes grants Mount Athos its first charter (Typikon).
• 973 Moravia assigned to the Diocese of Prague, putting the West Slavic tribes under jurisdiction of German church.
• 975 Emperor John I Tzimiskes in a Syrian campaign takes Emesa, Baalbek, Damascus, Tiberias, Nazareth, Caesarea, Sidon, Beirut, Byblos and Tripoli, but fails to take Jerusalem.
• 978 Death of King Edward the Martyr.
• 980 Revelation of the Axion Estin (the hymn "It Is Truly Meet"), with the appearance of the Archangel Gabriel to a monk on Mount Athos.
• 980-5 The Western Rite Monastery of Amalfion is founded on Mount Athos.
• 987 Sixth Rus-Byzantine War, where Vladimir of Kiev dispatches troops to the Byzantine Empire to assist Emperor Basil II with an internal revolt, agreeing to accept Orthodox Christianity as his religion and bring his people to the new faith.
• 988 Baptism of Rus' begins with the conversion of Vladimir of Kiev who is baptized at Chersonesos, the birthplace of the Russian and Ukrainian Orthodox churches; Vladimir marries Anna, sister of Byzantine emperor Basil II.
• 992 Death of Michael, first Metropolitan of Kiev.
• 995 Olaf of Norway proclaims Norway to be a Christian kingdom; relics of Cuthbert transferred with his community to Durham.
• 1000 Conversion of Greenland and Iceland.
• 1008 Conversion of Sweden.
• 1009 Patr. Sergius II of Constantinople removes name of Pope Sergius IV of Rome from diptychs of Constantinople, because the pope had written a letter to the patriarch including the Filioque.
• 1009 Church of the Holy Sepulchre in Jerusalem destroyed by the "mad" Fatimid caliph Al-Hakim bi-Amr Allah, founder of the Druze.
• 1012 Caliph Al-Hakim bi-Amr Allah issues oppressive decrees against Jews and Christians including the destruction of all Christian and Jewish houses of worship.
• 1014 Filioque used for first time in Rome by Pope Benedict VIII at coronation of Henry II, Holy Roman Emperor.
• 1015 Death of Vladimir of Kiev.
• 1017 Danish king Canute converts to Christianity.
• 1022 Death of Simeon the New Theologian.
• 1027 Frankish protectorate over Christian interests in Jerusalem is replaced by a Byzantine protectorate, which begin reconstruction of Holy Sepulchre.
• 1036 Byzantine Emperor Michael IV makes a truce with the Caliph of Egypt to allow rebuilding of the Church of the Holy Sepulchre by Byzantine masons; Varangian Guard of the Byzantine Emperor sent to protect pilgrims.
• 1043 Edward the Confessor crowned King of England at Winchester Cathedral.
• 1045-50 Cathedral of Saint Sophia in Novgorod built, the oldest Orthodox church building in Russia, executed in an architectural style more austere than the Byzantine, reminiscent of the Romanesque.
• 1048 Re-consecration of Holy Sepulchre.
• 1051 Monastery of the Kiev Caves founded.
• 1054 Cardinal Humbert excommunicates Michael Cerularius, patriarch of Constantinople, a major centerpoint in the formation of the Great Schism between East and West; First Letter of Michael Cerularius to Peter of Antioch.
• 1059 Errors of Berengar of Tours condemned in Rome; term transubstantiation begins to come in to use, ascribed to Peter Damian.
• 1064 Seljuk Turks storm Anatolia taking Caesarea and Ani, conquering Armenia.
• 1066 Normans invade England flying banner of Pope of Rome, defeating King Harold of England at Battle of Hastings.
• 1066-1171 Beginning reformation of English church and society to align with Latin continental ecclesiology and politics.
• 1071 Seljuk Turks defeat Byzantines at the Battle of Manzikert, beginning Islamification of Asia Minor; Norman princes led by Robert Guiscard capture Bari, the last Byzantine stronghold in Italy, bringing to an end over five centuries of Byzantine rule in the south.
• 1073 Hildebrand becomes Pope Gregory VII and launches the Gregorian reforms (celibacy of the clergy, primacy of papacy over empire, right of Pope to depose emperors); Seljuk Turks conquer Ankara.
• 1074 Death of Theodosius of the Kiev Caves.
• 1075 Dictatus Papae document advances Papal supremacy.
• 1077 The Seljuk Turks capture Jerusalem and kill 3,000 citizens; Seljuks capture Nicea.
• 1084 Antioch is captured by the Seljuk Turks from the Byzantines.
• 1088 Founding of monastery of John the Theologian on Patmos; election of Pope Urban II, a prominent member of the Cluniac Reform movement .
• 1095 Launching of the First Crusade.
• 1098 Anselm of Canterbury completes Cur Deus homo, marking a radical divergence of Western theology of the atonement from that of the East.
• 1098 Crusaders capture Antioch.
• 1099 Crusaders capture Jerusalem founding the Latin Kingdom of Jerusalem and other crusader states known collectively as "Outremer."
• 1108 Death of Nicetas of Kiev Caves, Bishop of Novgorod.
• ca. 1131-45 Coptic Pope of Alexandria Gabriel II initiates addition of Arabic as a liturgical language with his Arabic translation of the Liturgy.
• 1144 Bernard of Clairvaux calls for a Second Crusade to rescue the besieged Latin kingdom of Jerusalem; Kings Louis VII of France and Konrad III of Germany join Crusaders, but are defeated by Muslims; Muslims take Christian stronghold of Edessa.
• 1149 Crusaders begin to renovate Church of the Holy Sepulchre in Romanesque style, adding a bell tower.
• 1159 John of Salisbury authors Policraticus, a treatise on government drawing from the Bible, the Codex Justinianus, and arguing for Divine Right of Kings.
• 1170 Miracle of the weeping icon of the Theotokos "of the Sign" at Novgorod; Anglo-Norman invasion of Ireland; city of Dublin captured by the Normans.
• 1176 Sultanate of Rum defeats Byzantine Empire in the Battle of Myriokephalon, marking end of Byzantine attempts to recover Anatolian plateau; Al-Adil I, Muslim ruler of Egypt, suppresses a revolt by Christian Copts in city of Qift, hanging nearly 3,000 of them.
• 1180 Last formal acceptance of Latins to communion at an Orthodox altar in Antioch.
• 1182 Maronites, who assisted the Crusaders during the Crusades, reaffirm their affiliation with Rome in 1182; dedication of Monreale Cathedral in Sicily, containing the largest cycle of Byzantine mosaics extant in Italy.
• 1186 Byzantine Empire recognizes independence of Bulgaria and Serbia.
• 1187 Saladin retakes Jerusalem after destroying crusader army at Battle of Hattin, and returns Christian holy places to Orthodox Church.
• 1189 Third Crusade led by King Richard the Lion-Hearted of England, King Philip Augustus II of France, and Emperor Frederick Barbarossa.
• ca. 1189 Ethiopian Emperor Gebre Mesqel Lalibela orders construction of Lalibela.
• 1204 Fourth Crusade sacks Constantinople, laying waste to the city and stealing many relics and other items; Great Schism generally regarded as having been completed by this act; Venetians use the imperial monastery of Christ Pantocrator as their headquardters in Constantinople; Theodore I Lascaris establishes the Empire of Nicaea.
• ca. 1204-75 Martyrdom by Latins of monks of Iveron Monastery.
• ca.1207 Stephen Langton divides the Bible into the defined modern chapters in use today.
• ca.1220 English Bp. Richard Le Poore is said to have been responsible for the final form of the "Use of Sarum", which had the sterling reputation of being the best liturgy anywhere in the West.
• 1228 Sixth Crusade results in 10-year treaty starting in 1229 between Holy Roman Emperor Frederick II and Egyptian sultan; Jerusalem ceded to Franks, along with a narrow corridor to the coast, as well as Nazareth, Sidon, Jaffa and Bethlehem.
• 1231 Papal Inquisition initiated by Pope Gregory IX, charged with suppressing heresy.
• 1235 Death of Sava of Serbia.
• 1237 Golden Horde begin subjugation of Russia.
• 1240 Mongols sack Kiev; Prince Alexander Nevsky defeats Swedish army at Battle of the Neva.
• 1242 Alexander Nevsky's Novgorodian force defeats Teutonic Knights in Battle of Lake Peipus, a major defeat for the Catholic crusaders.
• 1244 Jerusalem conquered and razed by Khwarezmian mercenaries (Oghuz Turks) serving under the Ayyubid ruler of Egypt Salih Ayyub, triggering Seventh Crusade.
• 1247 Ayyubids conquer Jerusalem, driving out the Khwarezmian Turks.
• 1258 Michael VIII Palaiologos seizes the throne of the Nicaean Empire, founding the last Roman (Byzantine) dynasty, beginning reconquest of Greek peninsula from Latins.
• 1259 Byzantines defeat Latin Principality of Achaea at the Battle of Pelagonia, marking the beginning of the Byzantine recovery of Greece.
• 1260 Subjugation of Church of Cyprus to the Roman Catholic Church.
• 1261 End of Latin occupation of Constantinople and restoration of Orthodox patriarchs; Emperor Michael VIII Palaiologos makes Mystras seat of the new Despotate of Morea, where a Byzantine renaissance occurred.
• 1268 Egyptian Mamelukes capture Antioch.
• 1269 Orthodox patriarch returns to Antioch after a 171-year exile and usurpation by Latin patriarch.
• 1274 Second Council of Lyons held, proclaiming union between the Orthodox East and the Roman Catholic West, but generally unaccepted in the East.
• 1275 Unionist Patriarch of Constantinople John XI Beccus elected to replace Patriarch Joseph I Galesiotes, who opposed Council of Lyons; 26 martyrs of Zographou monastery on Mt. Athos, martyred by the Latins.
• ca. 1280 Kebra Nagast ("Book of the Glory of Kings") compiled, a repository of Ethiopian national and religious feelings.
• 1281 Pope Martin IV authorizes a Crusade against the newly re-established Byzantine Empire in Constantinople, excommunicating Emperor Michael VIII Palaiologos and the Greeks and renouncing the union of 1274; French and Venetian expeditions set out toward Constantinople but are forced to turn back in the following year.
• 1291 Fall of Acre; end of crusading in Holy Land.
• 1298 Ambrose, Augustine, Jerome, and Pope Gregory I are named collectively as the first Great Doctors of the Western Church.
• 1302 Papal Bull Unam Sanctum issued by Pope Boniface VIII proclaims Papal supremacy.
• 1326 Metr. Peter moves his see from Kiev to Vladimir and then to Moscow.
• 1332 Amda Syon, Emperor of Ethiopia begins his campaigns in the southern Muslim provinces, allowing for the spread of Christianity to frontier areas.
• 1336 Meteora in Greece established as a center of Orthodox monasticism.
• 1338 Gregory Palamas writes Triads in Defense of the Holy Hesychasts, defending the Orthodox practice of hesychast spirituality and the use of the Jesus Prayer.
• 1340 Holy Trinity-St. Sergius Lavra founded by Sergius of Radonezh.
• 1341-51 Three sessions of the Ninth Ecumenical Council held in Constantinople, affirming hesychastic theology of Gregory Palamas and condemning rationalistic philosophy of Barlaam of Calabria.
• 1342 Patriarchate of Antioch transferred to Damascus under Ignatius II.
• 1349 Prince Stephen Dushan of Serbia assumes the title of Tsar (Caesar); principality of Galicia (Halitsh) comes under Polish control.
• 1354 Ottoman Turks make first settlement in Europe at Gallipoli.
• 1359 Death of Gregory Palamas.
• 1360 Death of John Koukouzelis the Hymnographer.
• 1379 Western Great Schism ensues, including simultaneous reign of three Popes of Rome.
• ca. 1380 English Church reformer John Wyclif writes that the true faith is preserved only in the East, "among the Greeks."
• 1382-95 First English Bible translated by John Wyclif.
• 1383 Stephen of Perm, missionary to Zyrians, consecrated bishop; appearance of Theotokos of Tikhvin icon.
• 1385 Kreva Agreement provides for conversion of Lithuanian nobles and all pagan Lithuanians to Roman Catholicism, joining Grand Duchy of Lithuania with the Kingdom of Poland through a dynastic union.
• 1387 Lithuania converts to Roman Catholicism, while most Ruthenian lands (Belarus and Ukraine) remain Orthodox.
• 1389 Serbs defeated by Ottoman Turks of Sultan Murad I at the battle of Kosovo Polje; death of Lazar, prince of Serbia.
• 1390 Ottomans take Philadelphia, last significant Byzantine enclave in Anatolia.
• 1391-98 Ottoman Turks unsuccessfully besiege Constantinople for the first time.
• 1410 Iconographer Andrei Rublev paints his most famous icon depicting the three angels who appeared to Abraham and Sarah, the angels being considered a type of the Holy Trinity.
• 1414-18 Council of Constance in Roman Catholic Church represents high point for Conciliar Movement over authority of pope.
• 1417 End of Western Great Schism at the Council of Constance.
• 1418 Latin monk Thomas à Kempis authors The Imitation of Christ.
• 1422 Second unsuccessful Ottoman siege of Constantinople.
• 1423-24 Council of Siena in the Roman Catholic Church was the high point of conciliarism, emphasizing the leadership of the bishops gathered in council, but the conciliarism expressed there was later branded as a heresy.
• 1439 Ecclesiastical reunion with West attempted at Council of Florence, where only Mark of Ephesus refuses to capitulate to demands of delegates from Rome.
• 1440-41 Encyclical Letter of Mark of Ephesus.
• 1444 Donation of Constantine proved forgery.
• 1448 Church of Russia unilaterally declares its independence from the Church of Constantinople; Vatican Library formally established by Pope Nicholas V.
• 1452 Unification of Roman Catholic and Greek Orthodox Churches in Hagia Sophia on West's terms, when Emperor Constantine XI Palaiologos, under pressure from Rome, allows the union to be proclaimed.
• 1453 Constantinople falls to invasion of the Ottoman Turks, ending Roman Empire; Hagia Sophia turned into a mosque; martyrdom of Constantine XI Palaiologos, last of the Byzantine Emperors; many Greek scholars escape to the West with books that become translated into Latin, triggering the Renaissance.

Post-Imperial era (1453-1821)

• 1455 Gutenberg makes first printed Bible.
• 1455-56 Confession of Faith by Patr. Gennadius of Constantinople.
• 1456-1587 Byzantine Church of Theotokos Pammakaristos became the seat of the Ecumenical Patriarchate.
• 1492 Millennialist movements in Moscow, due to end of church calendar (year 7,000, according to the Byzantine Date of Creation).
• 1503 Possessor and Non-Possessor controversy.
• 1516 Desiderius Erasmus publishes "Textus Receptus" of New Testament on the basis of six late manuscripts of the Byzantine text-type.
• 1517 Maximus the Greek invited to Russia to translate Greek service books and correct Russian ones; Ottomans conquer Jerusalem, Antioch and Alexandria.
• 1526 Non-Possessors attack Tsar Vassily III for divorcing his wife and are driven underground.
• 1529 First Ottoman Siege of Vienna, marking Ottoman Empire's apex and end of Ottoman expansion in central Europe.
• 1551 Council of the Hundred Chapters in Russia.
• 1552 Death of Basil the Blessed.
• 1555 Abp. Gurian begins mission to Kazan.
• 1568 Pope Pius V recognizes four Great Doctors of the Eastern Church, John Chrysostom, Basil the Great, Gregory of Nazianzus, and Athanasius.
• 1569 Union of Lublin unites Kingdom of Poland and Grand Duchy of Lithuania into a single state, the Polish-Lithuanian Commonwealth, placing the Ruthenian Orthodox lands of Belarus, and modern Ukraine under direct Roman Catholic rule.
• 1571 Restoration of Church of Cyprus to Orthodox rule.
• 1573-81 Correspondence of Patr. Jeremias II of Constantinople with Lutherans.
• 1575 Church of Constantinople grants autonomy to Church of Sinai.
• 1582 Institution of the Gregorian Calendar by Pope Gregory XIII.
• 1583 Sigillion of 1583 issued against Gregorian Calendar by council convened in Constantinople.
• 1587-Present. The relatively modest Church of St George in the Phanar district of Istanbul becomes the seat of the Ecumenical Patriarchate.
• 1589 Autocephaly and canonical territory of Church of Russia recognized, as Patr. Jeremias II of Constantinople raises Metr. Job of Moscow to the rank of Patriarch of Moscow and of All Russia.
• 1596 Union of Brest-Litovsk, several million Ukrainian and Byelorussian Orthodox Christians, living under Polish rule, leave the Church of Constantinople and recognize the Pope of Rome, without giving up their Byzantine liturgy and customs, creating the Uniate church.
• ca. 1600-1700 Conversion of Albania to Islam mainly through discriminatory tax system, the Djize.
• 1625 Confession of Faith by Metrophanes Kritopoulos written.
• 1627 Pope Cyril Lukaris of Alexandria presents Codex Alexandrinus to King Charles I of England for safe keeping.
• 1633 Ethiopian emperor Fasilides expels Jesuits and other Roman Catholic missionaries from Ethiopia.
• 1642 Council of Jassy (Iaşi) revises Peter Mogila's confession to remove overtly Roman Catholic theology and confirms canonicity of certain deuterocanonical books.
• 1646 Union of Uzhhorod joins 63 Ruthenian Orthodox priests from the Carpathian Mountains to Roman Catholic Church on terms similar to Union of Brest.
• 1652-1658 Patriarch Nikon of Moscow revises liturgical books to bring them into conformity with the Greek liturgical customs, leading to mass excommunication and schism of dissenters, who become known as Old Believers.
• 1672 Synod of Jerusalem convened by Patr. Dositheos Notaras, refuting article by article the Calvinistic confession of Cyril Lucaris, defining Orthodoxy relative to Roman Catholicism and Protestantism, and defining the Orthodox Biblical canon; acts of this council are later signed by all five patriarchates (including Russia).
• 1685 Orthodoxy introduced in Beijing by Church of Russia.
• 1698 Consecration of the first Orthodox Church in China, in the name of Sophia (Divine Wisdom), when Emperor Kangxi ordered a Buddhist temple to be cleared for Russian inhabitants in Beijing.
• 1700 The Creation Era calendar in Russia, in use since AD 988 was changed to the Julian Calendar by Peter the Great.
• 1700-02 Submission of the dioceses of Lemberg (Lviv) and Luzk (Lutsk) in the Galician area of Ukraine to Roman Catholic Church completes Union of Brest-Litovsk, so that two-thirds of the Orthodox in western Ukraine had become Greek Catholic.
• 1715 Metr. Arsenios of Thebaid sent to England by Pope Samuel of Alexandria to negotiate with Non-Juror Anglican bishops.
• 1716-25 Correspondence of Ecumenical Patriarch and Russian Czar with English Non-Jurors.
• 1721 Czar Peter I of Russia replaces Russian patriarchate with a ruling holy synod.
• 1724 Melkite schism, in which many faithful from the Church of Antioch become Uniates.
• 1728 The Ecumenical Patriarchate formally replaced the Creation Era (AM) calendar with the Christian Era (AD).
• 1731 Death of Innocent of Irkutsk.
• 1754 Hesychast Renaissance begins with the Kollyvades Movement.
• 1755 Synod of Constantinople declares Roman Catholic baptism invalid and ordered baptism of converts from Roman Catholicism.
• 1756 Sigillion of 1756 issued against the Gregorian Calendar by Patr. Cyril V of Constantinople.
• 1767 Ottoman Empire legally divides Church of the Holy Sepulchre among claimants.
• 1767-1815 Suppression of the Jesuits in Roman Catholic countries, subsequently finding refuge in Orthodox nations, particularly in Russia.
• 1768 Jews are massacred during riots in Russia-occupied Poland.
• ca. 1770 About 1,200 Kiev region Uniate churches return to Orthodoxy under political pressure from Russia.
• 1774 Russia and Ottoman Empire sign treaty of Kuchuk-Kainarji, bringing Russia for the first time into the Mediterranean as the acknowledged protector of Orthodox Christians.
• 1779 Death of Kosmas Aitolos.
• 1782 First publication of Philokalia ; autonomy of Church of Sinai confirmed by Church of Constantinople.
• 1793-95 Over 2,300 Uniate churches became Orthodox under Tsarina Catherine the Great.
• 1794 Missionaries, including Herman of Alaska, arrive at Kodiak Island, bringing Orthodoxy to Russian Alaska; death of Paisius Velichkovsky of Moldova and Mt. Athos.
• 1796 Nicodemus the Hagiorite publishes Unseen Warfare in Venice.
• 1800 The Rudder published and printed in Athens.
• 1805 Death of Makarios of Corinth, a central figure in the Kollyvades movement.
• 1811 Autocephaly of the Church of Georgia revoked by the Russian imperial state after Georgia's annexation, making it subject to the Church of Russia.
• 1819 Council at Constantinople endorses views of Kollyvades fathers.

Modern era (1821-1917)

• 1821 Metr. Germanos of Patra declares Greek independence on Day of Annunciation (March 25), also Kyriopascha; martyrdom of Patr. Gregory V of Constantinople, Abp. Kyprianos of Cyprus, and Abp. Gerasimos of Crete in retaliation.
• ca. 1830 Slavophile movement begins in Russia.
• 1831 Return of 3,000,000 Uniates with the Orthodox Church at Vilnius in 1831.
• 1832 Church of Serbia becomes de facto autocephalous.
• 1833 Church of Greece declares autocephaly, making it independent of the Constantinople; death of Seraphim of Sarov.
• 1839 Synod of Polotsk abolishes Union of Brest-Litovsk in all areas under Russian rule as Greek Catholic dioceses in Lithuania and Belarus re-enter the Orthodox Church.
• 1848 Encyclical of the Eastern Patriarchs sent by the primates and synods of the four ancient patriarchates of the Orthodox Church, condemning the Filioque as heresy, declaring the Roman Catholic Church to be heretical, schismatic, and in apostasy, repudiating Ultramontanism and referring to the Photian Council of 879-880 as the "Eighth Ecumenical Council."
• 1850 Church of Constantinople recognizes autocephaly of Church of Greece.
• 1851 Translation into English of Septuagint by Lancelot C. L. Brenton; Ottoman Empire recognizes France as supreme Christian authority in Holy Land and grants it possession of the Church of the Nativity.
• 1852 Ottoman Empire makes division of Church of the Holy Sepulchre permanent.
• 1853-56 Crimean War fought between Russia and the Ottoman Empire together with Britain and France, beginning over which church would be recognized as the "sovereign authority" of the Christian faith in the Holy Land.
• 1854 Immaculate Conception declared dogma by Roman Catholic Church.
• 1859 Constantin von Tischendorf discovers Codex Sinaiticus at St. Catherine's Monastery.
• 1860 Death of Alexei Khomiakov, co-founder of the Slavophile movement.
• 1864 First Orthodox parish established on American soil in New Orleans, Louisiana, by Greeks; death of Jacob Netsvetov.
• 1865 Church of Romania declares its independence from the Church of Constantinople.
• 1869 Russian synod authorizes corrected text of Western Rite liturgy and Benedictine offices.
• 1870 Papal Infallibility declared Roman Catholic dogma necessary for salvation by First Vatican Council.
• 1871 Nikolai Kasatkin establishes Orthodox mission in Japan.
• 1872 Council in Jerusalem declares phyletism to be heresy; Church of Bulgaria gains de facto autocephaly by a decree of the Sultan.
• 1875 Uniate diocese of Chelm in Poland incorporated into Russian Orthodox Church under Alexander II, with all of the local Uniates converted to Orthodoxy.
• 1876 Theophan the Recluse begins issuing a translation of the Philokalia in Russian.
• 1879 Church of Constantinople recognizes autocephaly of Church of Serbia; death of Innocent of Alaska.
• 1882 Synod of Constantinople gives conditional approval to use of Roman liturgy and Benedictine offices.
• 1885 Church of Constantinople recognizes autocephaly of Church of Romania; English Revised Version published; Archbishop of Canterbury officially removes all of Apocrypha from King James Bible.
• 1889 Federation of Old Catholic Churches, not in communion with Rome, at the Union of Utrecht.
• ca. 1890 Unseen Warfare further revised by Theophan the Recluse.
• 1891 Death of Ambrose of Optina.
• 1895 Reply of Synod of Constantinople to Pope Leo XIII.
• 1898 Last ethnically Greek patriarch of Antioch deposed; Western Rite diocese organized in Czechoslovakia by Church of Russia.
• 1899 Restoration of Arabs to the Patriarchal throne of Antioch.
• 1900 Martyrdom of Orthodox Christians in Chinese Boxer (Yihetuan Movement) Rebellion.
• 1901 "Evangelakia" riots in Athens Greece in November, over translations of New Testament into Demotic (modern) Greek, resulting in fall of both government and Metropolitan of Athens.
• 1904 Ecumenical Patriarchate publishes the "Patriarchal" Text of the Greek New Testament, based on about twenty Byzantine manuscripts; petition to Russian synod by Abp. Tikhon (Belavin), Bp. Raphael (Hawaweeny), and Fr. John Kochurov to permit adaption of services taken from Anglican Book of Common Prayer for use by Orthodox people.
• 1905 Death of Apostolos Makrakis; Tsar Nicholas Romanov's decree on freedom of religion results in about 250,000 Ruthenians returning to Uniatism; seat of Russian Orthodox bishop in America moved from San Francisco to New York, as immigration from Eastern Europe and the reception of ex-Uniates shifts the balance of Orthodox population to eastern North America.
• 1907 Archim. Eusebius Matthopoulos founds Zoe Brotherhood; Commission on Anglican and Old Catholic Affairs of Russian synod reports in favor of adaptation of services from Book of Common Prayer and sets out criteria.
• 1908 Fr. Nikodemos Sarikas sent to Johannesburg, Transvaal, by Ecumenical Patriarchate as first Orthodox priest there, leaving after a short time for German East Africa (later Tanzania) because of the opposition of Johannesburg Greeks to mission among Africans.
• 1908 Death of John of Kronstadt.
• 1912 Death of Nicholas of Japan.