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- Arsenios
- Arsenios (disambiguation)
- Arsenios of Cappadocia
- Arsenios of Corfu
- Arsenios of Paros
- Arsenios of Tver
- Arsenios the Cappadocian
- Arsenios the Cave-Dweller
- Arsenite Schism
- Arsenius (Heikkinen) of Joensuu
- Arsenius (Kardamakis) of Austria
- Arsenius (Stadnitsky) of Novgorod
- Arsenius (Stadnitsky) of Tashkent
- Arsenius Autoreianus of Constantinople
- Arsenius III (Carnojevic) of Pec
- Arsenius IV (Jovanovic-Sakabenta) of Pec
- Arsenius I (Sremac) of Pec
- Arsenius of Alexandria
- Arsenius of Paros
- Arsenius of Tver
- Arsenius the Great
- Arseny (Chagovets)
- Arseny (Chagovtsov) of Winnipeg
- Arseny (Chavtsov) of Winnipeg
- Arseny (Chekandrakov) of Plovdiv
- Arseny (Heikkinen) of Joensuu
- Arseny (Streltzof)
- Artemius of Alexandria
- Artemius of Verkola
- Artemius of Verkolsk
- Artoklasia
- Artophorion
- Ascension
- Ascension icon
- Ascetic
- Asceticism
- Ascholius of Thessalonica
- Asil (Blatsos) of Caesarea
- Asitus of Dyrrachium
- Asperges
- Assembly of Canonical Orthodox Bishops of North and Central America
- Assembly of Canonical Orthodox Bishops of the United States of America
- Assuage My Sorrows
- Assuage My Sorrows icon
- Assumption
- Assumption of the Virgin Monastery (Bachkovo, Bulgaria)
- Assyrian Church
- Assyrian Church of the East
- Assyrians
- Asterisk
- Asti (Bakallbashi) of Bylisi
- Astius
- Astius (Bakallbashi) of Bylisi
- Astius of Dyrrachium
- Atallah Hanna
- Athanasian Creed
- Athanasios (Akunda)
- Athanasios (Akunda) of Kisumu
- Athanasios (Kykkotis) of Cyrene
- Athanasios Mitilinaios
- Athanasios of Cyrene
- Athanasios of Limassol
- Athanasios the Neomartyr
- Athanasius
- Athanasius (disambiguation)
- Athanasius III Dabbas of Antioch
- Athanasius III of Alexandria
- Athanasius II (Pattelarus) of Constantinople
- Athanasius II Dabbas of Antioch
- Athanasius II of Alexandria
- Athanasius II of Naples
- Athanasius I of Constantinople
- Athanasius I of Naples
- Athanasius Parios
- Athanasius V of Jerusalem
- Athanasius of Alexandria
- Athanasius of Athos
- Athanasius of Attalia
- Athanasius of Brest
- Athanasius of Bretsk
- Athanasius of Thessalonica
- Athanasius the Great
- Athanasius the Martyr of Sabaste
- Athanasius the Reader
- Athanasius the Superintendent of Prisoners
- Athanasy (Martos) of Brisbane
- Athanasy (Martos) of Buenos Aires
- Atheism
- Athenagoras
- Athenagoras (Aneste)
- Athenagoras (Aneste) of Mexico
- Athenagoras (Dikaiakos) of Ilion
- Athenagoras (Kavadas) of Thyateira and Great Britain
- Athenagoras (Kokkinakis) of Thyateira and Great Britain
- Athenagoras (Peckstadt) of Belgium
- Athenagoras (Peckstadt) of Sinope
- Athenagoras I
- Athenagoras I (Kavadas) of Thyateira and Great Britain
- Athenagoras I (Spyrou) of Constantinople
- Athenagoras of Athens
- Athenodorus of Byzantium
- Athenogenes
- Athonias Ecclesiastical Academy
- Athonite Fathers and Athonite Matters (Elder Paisios)
- Athos
- Atrium
- Attallah Hanna
- Augmented Litany
- Augoustinos Kantiotes
- August 1
- August 10
- August 11
- August 12
- August 13
- August 14
- August 15
- August 16
- August 17
- August 18
- August 19
- August 2
- August 20
- August 21
- August 22
- August 23
- August 24
- August 25
- August 26
- August 27
- August 28
- August 29
- August 3
- August 30
- August 31
- August 4
- August 5
- August 6
- August 7
- August 8
- August 9
- Augustine (Markevitch) of Lviv
- Augustine (Markevitch) of Lviv and Galicia
- Augustine Kantiotis
- Augustine of Canterbury
- Augustine of Hippo
- Augustinos (Kantiotes) of Florina
- Aurel Jivi
- Aurelius of Carthage
- Australia
- Australian Byzantine Choir
- Australian jurisdictions without a local bishop
- Australian monasteries (list)
- Autocephalic Greek Orthodox Church of America and Australia
- Autocephalous
- Autocephalous Greek Orthodox Church of America and Australia
- Autocephalous Greek Orthodox Metropolis of America and Canada
- Autocephaly
- Automelon
- Autonomous
- Autonomous Archdiocese of Ohrid
- Autonomous Metropolia of Milan and Western Europe
- Autonomous Orthodox Church of Milan, Western Europe and Canada
- Autonomous Orthodox Church of Milan of and Western Europe and Canada
- Autonomous Orthodox Metropolia of North and South America and the British Isles
- Autonomous Orthodox Metropolia of the Americas and the British Isles
- Autonomous Orthodox Metropolia of the North and South America and the British Isles
- Autonomy
- Auxentios (Pastras) of Athens and All Greece (T.O.C.)
- Auxiliary bishop
- Averky (Taushev) of Syracuse
- Avitus
- Avvakum
- Aximus of Alexandria
- Axios
- Azymes
- Babylas of Antioch
- Balamand Agreement
- Balamand Orthodox Theological Seminary (Tripoli, Lebanon)
- Balamand Statement
- Baptism
- Baptism-Chrismation Service
- Baptism of Rus'
- Baptismal names
- Baptistry
- Baptistry of John (Patmos)
- Baptists
- Baptize
- Barbara (Trofimova) of Piukhtitsa
- Barbara (Trofimova) of Piukhtitsa Convent
- Barbara of Heliopolis
- Barbara of Nicomedia
- Barlaam of Calabria
- Barlaam of Moscow
- Barlaam of the Kiev Caves
- Barnabas (Nastić) of Hvosno
- Barnabas (Prokofiev)
- Barnabas (Safronov) of Pavlodar
- Barnabas (Safronov) of Pavlodar and Ust-Kamenogorsk
- Barnabas (Tyris) of Neapolis
- Barnabas of Trimithounta
- Barsanuphius of Optina
- Barsoum El-Erian
- Bartholomeos (Katsouris) of Megara
- Bartholomew I
- Bartholomew I (Archontonis) of Constantinople
- Barthoromeos (Katsouris) of Megara
- Baselios Didymos I
- Basil
- Basil (Blatsos) of Caesarea
- Basil (Doroszkiewicz) of Poland
- Basil (Doroszkiewicz) of Warsaw
- Basil (Essey) of Wichita
- Basil (Fedak) of Winnipeg
- Basil (Kodseie)
- Basil (Miceli) of Ostia
- Basil (Osborne) of Amphipolis
- Basil (Osborne) of Sergievo
- Basil (Papachristou) of Dryinoupolis
- Basil (Rodzianko) of San Francisco
- Basil (Shuan) of Beijing
- Basil (Shuang) of Beijing
- Basil (disambiguation)
- Basil III (Georgiadis) of Constantinople
- Basil Kalika of Novgorod
- Basil Osborne
- Basil and Theodore
- Basil of Ancyra
- Basil of Beth Man'em
- Basil of Cherson
- Basil of Jerusalem
- Basil of Ostrog
- Basil the Blessed
- Basil the Confessor
- Basil the Elder
- Basil the Great
- Basileios of Smyrna
- Basilica
- Basilica Monument of St. Isidore (Chios)
- Basilio (Grillo Miceli) of Ravenna and L'Aquila
- Basilios (Kodseie)
- Basilios (Kodseie) of Australia
- Basilios (Kodseie) of Australia, New Zealand and the Philippines
- Basilissa of Nicomedia
- Bassa of Edessa
- Bassian of Kazan
- Battle of Milvian Bridge
- Beatitudes
- Beautitudes
- Bede
- Beheading of St. John the Forerunner
- Belarusian Autocephalous Orthodox Church
- Belarusian Council of Orthodox Churches in North America
- Bells
- Belogorsky St. Nicholas Orthodox Missionary Monastery Cathedral (Perm Krai, Russia)
- Bema
- Ben Lomond Crisis
- Benedict (Papadopoulos) of Jerusalem
- Benedict (Plotnikov) of Kazan
- Benedict (Tsekouras) of Philadelphia
- Benedict (disambiguation)
- Benedict III of Rome
- Benedict IX of Rome
- Benedict VIII of Rome
- Benedict VI of Rome
- Benedict XVI
- Benedict of Jerusalem
- Benedict of Nursia
- Bengt Pohjanen
- Benjamin
- Benjamin (Basalyga)
- Benjamin (Basalyga) of Pittsburgh
- Benjamin (Fedchenkov) of Saratov
- Benjamin (Fedchenkov) of the Aleutians
- Benjamin (Kazansky) of Petrograd
- Benjamin (Kazansky) of Petrograd and Gdovsk
- Benjamin (Peterson) of San Francisco
- Benjamin (Putsek-Grigorovich) of Kazan
- Benjamin I
- Benjamin I of Constantinople
- Berhtwald
- Beuno the Wonderworker
- Bible
- Biblical Odes
- Biblical canon
- Bibliography of Orthodoxy in America
- Birinus of Dorchester
- Birnstan of Winchester
- Birth Control and Contraception
- Bishop
- Bishop Akakios of Talantion
- Bishop Germanos of Patra
- Bishop Vassilij of Ostia
- Bishop of San Francisco
- Bishops
- Bishops of the Diocese of Kazan
- Bishops of the Russian Metropolia in North America
- Bishops of the Russian church in North America
- Bishoy
- Bishoy (Nicola) of Damietta
- Bishoy Kamel
- Blaise of Sebaste
- Blessed Virgin Mary
- Blessing of homes
- Blood
- Blood in the Bible
- Body of Christ
- Bogomilism
- Boniface
- Book of Acts
- Book of Enoch
- Book of Genesis
- Book of Joshua
- Book of Judges
- Book of Kells
- Book of Nahum
- Book of Nehemiah
- Book of Numbers
- Book of Philemon
- Book of Revelation
- Book of Ruth
- Book of the Bee
- Booksellers
- Boris (Geeza) of Chicago
- Boris Bobrinskoy
- Boris I of Bulgaria
- Boris T. Pash
- Boris and Gleb
- Bosa of York
- Botswana
- Brahmavar (Goan) Orthodox Church
- Branch theory
- Bread and Salt
- Bregowine
- Brendan the Navigator
- Brendan the Voyager
- Brianchaninov
- Bride of Christ
- Bridegroom
- Brief dictionary of orthodox terms
- Bright Week
- Brigid of Kildaire
- Brigid of Kildare
- British Orthodox Church
- British Orthodox Church (Coptic)
- Broken/ow:FAQ