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- St. Nicholas Monastery (Andros, Greece)
- St. Nicholas Orthodox Church (Mogadore, Ohio)
- St. Nikola Church (Cudahy, Wisconsin)
- St. Nilus Island Skete
- St. Paisius Serbian Orthodox Monastery (Safford, Arizona)
- St. Panteleimon's Monastery (Athos)
- St. Panteleimon Monastery Fathers (Athos)
- St. Paul's Monastery (Athos)
- St. Paul's Theological Course of Studies
- St. Paul Skete (Grand Junction, Tennessee)
- St. Peter and St. Paul Orthodox Church (Burr Ridge, Illinois)
- St. Petersburg Theological Academy
- St. Petroc Monastery (Cascades, Tasmania)
- St. Platon's Orthodox Theological Seminary (Tenafly, New Jersey)
- St. Sabbas the Sanctified Monastery (Harper Woods, Michigan)
- St. Sava's Serbian Orthodox Seminary (Libertyville, Illinois)
- St. Sava Cathedral (New York, New York)
- St. Sava Cathedral (New York City , New York)
- St. Sava Church (Douglas, Alaska)
- St. Sava Church (Jackson, California)
- St. Sava School (Milwaukee, Wisconsin)
- St. Sava Serbian Orthodox Church (Farrer, Australian Capital Territory)
- St. Sergius Orthodox Theological Institute (Paris, France)
- St. Simon Church (Ironwood, Michigan)
- St. Sophia
- St. Sophia Cathedral (Harbin, China)
- St. Sophia Cathedral (Los Angeles, California)
- St. Sophia Cathedral (Novgorod)
- St. Sophia Ukrainian Orthodox Theological Seminary (South Bound Brook, New Jersey)
- St. Stephen's Course in Orthodox Theology
- St. Stephen Monastery (Meteora)
- St. Theodore House (Galion, Ohio)
- St. Tikhon's Orthodox Monastery (South Canaan, Pennsylvania)
- St. Tikhon's Orthodox Theological Seminary
- St. Tikhon's Orthodox Theological Seminary (South Canaan, Pennsylvania)
- St. Vladimir's Camp, Farmingdale, OH
- St. Vladimir's Camp (Farmdale, Ohio)
- St. Vladimir's Camp (Farmingdale, Ohio)
- St. Vladimir's Orthodox Theological Seminary
- St. Vladimir's Orthodox Theological Seminary (Crestwood, New York)
- St. Vladimir’s Memorial Church (Jackson)
- St. Vladimir’s Memorial Church (Jackson, New Jersey)
- St. Volodymyr's Ukrainian Orthodox Cathedral (Toronto, Ontario)
- St Alexei Mechev
- St Andrew's Greek Orthodox Theological College (Sydney, Australia)
- St George Serbian Orthodox Church (Forrest, Australian Capital Territory)
- St Moses the Black
- St Nicholas Anapafsas Monastery (Meteora)
- St Nicholas Hoonah Alaska
- St Nicholas of Japan
- St Paul's Theological Course of Studies
- St Peter and St Paul Orthodox Church (Burr Ridge, IL)
- St Sava Farrer
- St Sava Serbian Orthodox Church (Farrer, Australia)
- St Sava Serbian Orthodox Church (Farrer, Australian Capital Territory)
- St Sophia
- St Sophia Cathedral (Kiev)
- St Sophia Cathedral (Los Angeles)
- St Stephen Monastery (Meteora)
- St Stephen the Great
- St Stephen the Great Charitable Trust
- St Theodore Trichinas
- Standard
- Standing Conference of Canonical Orthodox Bishops in America
- Standing Conference of Canonical Orthodox Churches in Australia
- Standing Conference of Canonical Orthodox Churches of Australia
- Standing Conference of the Canonical Orthodox Bishops in the Americas
- Stanley Harakas
- Stanley S. Harakas
- Starets
- Statistics of Orthodoxy in Australia
- Stavronikita Monastery (Athos)
- Stavropeghial
- Stavropegial
- Stavropegic
- Stavrophore
- Stavropighial
- Stavropigial
- Stay of Our Sorrows
- Stefan Buchiu
- Stefan Nemanja
- Stefan Uros III of Serbia
- Stefan Uros II Milutin
- Stefan Wu Zhiquan
- Stem cell research
- Stephanos (Charalambides) of Tallinn
- Stephanos (Charalambites) of Tallinn
- Stephanos (Daniilidis) of Lemnos
- Stephanos (Matakoulias) of Triphylia and Olympia
- Stephanos (Pantanassiotis)
- Stephanos of Khinolakkos
- Stephen (Dzubay) of Pittsburgh
- Stephen (Lasko) of Boston
- Stephen (Yavorsky) of Ryazan
- Stephen Godley
- Stephen III of Rome
- Stephen II of Rome
- Stephen IV of Rome
- Stephen I of Constantinople
- Stephen I of Rome
- Stephen Nemanja
- Stephen V of Rome
- Stephen Yavorsky
- Stephen of Perm
- Stephen of Sourozh
- Stephen the Great
- Stephen the New
- Steven Peter Tsichlis
- Sticharion
- Stichera
- Sticheron
- Stoglavy Sobor
- Stole
- Stowe Missal
- Sts Anikitos and Photios Holy Unmercenaries
- Stub
- Studenica
- Studenica Monastery
- Studion Monastery
- Style Manual
- Stylianos (Harkianakis) of Australia
- Stylianos of Paphlagonia
- Stylite
- Subdeacon
- Sucevita Monastery (Bucovina, Romania)
- Sudan
- Suffragan bishop
- Suggestions for future development
- Sunday
- Sunday of Myrrh-bearing Women
- Sunday of Orthodoxy
- Sunday of St. Gregory Palamas
- Sunday of St. John Climacus
- Sunday of St. Mary of Egypt
- Sunday of St. Thomas
- Sunday of the Fathers
- Sunday of the Fathers of the First Six Councils
- Sunday of the Fathers of the Seventh Ecumenical Council
- Sunday of the Forefathers
- Sunday of the Holy Cross
- Sunday of the Last Judgment
- Sunday of the Prodigal Son
- Sunday of the Publican and Pharisee
- Superior
- Supersessionism
- Suprasl Monastery
- Supraśl Monastery
- Surplice
- Susanna
- Susanna (disambiguation)
- Susanna the Myrrh-Bearer
- Susanna the Virgin
- Suspension
- Suzdalites
- Svetitskhoveli Cathedral (Mtskheta, Georgia)
- Sviatohirsk Lavra
- Sylvester (Haruns) of Montreal
- Sylvester (Holmsky) of Kazan
- Sylvester I of Rome
- Sylvester Syropoulos
- Sylvester of Alexandria
- Sylvester of Antioch
- Symbol of Faith
- Symbolism
- Symeon
- Symeon (Du) of Shanghai
- Symeon (disambiguation)
- Symeon I of Trebizond
- Symeon of Thessalonica
- Symeon of Trier
- Symeon the New Theologian
- Symeon the Stylite
- Symmachus of Rome
- Synagogue
- Synaxarion
- Synaxarium
- Synaxis
- Synaxis (disambiguation)
- Synaxis of All Saints of Siberia
- Synaxis of Monastic Fathers who are venerated in the Near Caves of St Anthony
- Synaxis of the Baptist
- Synaxis of the Hierarchs of Moscow
- Synaxis of the Martyrs of Butovo
- Synaxis of the Saints of Rostov
- Synaxis of those whose relics repose in the Far Caves of St Theodosius
- Syndesmos
- Synod
- Synod of Milan
- Synod of Ras-Baalbek
- Synod of Whitby
- Synod of the Oak
- Synoptic gospels
- Synthronon
- Syriac Orthodox Church
- Syro-Malankara Catholic Church
- Tabernacle
- Tabernacle (biblical)
- Tabernacle (liturgical)
- Table of oblation
- Table of preparation
- Taiwan
- Takla Haymanot of Ethiopia
- Tama
- Tamata
- Taper-bearer
- Tarasios (Anton) of Buenos Aires
- Tarasios of Constantinople
- Tarasius of Constantinople
- Tatiana of Rome
- Tatwine
- Taxiarchis
- Taxiarhis
- Te Deum
- Te deum
- Tekle Haimanot II
- Telemachus
- Temperance
- Temple
- Temple of Saint Sava
- Temple of Saint Sava (Belgrade)
- Ten Holy Martyrs of Crete
- Teoctist (Arapasu) of Romania
- Teodor (Nestorovic) of Vršac
- Teodor of Vršac
- Teodora of Sihla
- Teofil (Ionescu) of Sèvres
- Tertullian
- Tertullian of Carthage
- Thaddeus (Strabulovich) of Vitovnica
- Thaddeus (Uspenskiy) of Tver
- Thaddeus (Uspensky) of Tver
- Thais the Harlot
- Thaisia
- Thaisia of Leushino
- Thank You
- The Abbey of the Holy Name (West Milford, New Jersey)
- The Apocrypha/Deuterocanonical Books
- The Canadian Conference of Orthodox Bishops Speaks Out on the Issue of Same-Sex Marriage
- The Church of Jesus Christ of Latter-Day Saints
- The Collection Of Safey The Son Of The Honey Maker
- The Coptic Orthodox Church in Japan
- The French Coptic Orthodox Church
- The Ge'ez Rite
- The Holy Family in Egypt
- The Holy Synod of the Coptic Orthodox Patriarchate of Alexandria
- The Humanity of Christ (What Oriental Orthodox Believe)
- The Intercession
- The Island
- The Ladder
- The Ladder of Divine Ascent
- The Lamp That Lights The Darkness In Clarifying The Service
- The Law of God (Serafim Slobodskoy)
- The Monastery: Mr. Vig and the Nun
- The One Will and the One Act
- The Paradise of the Desert Fathers
- The Parish and Holy Scripture
- The Prologue of Ohrid
- The Rosary
- The Rudder
- The Russian Orthodox Church of The Archangel Michael, Blacktown, New South Wales
- The Sacramentary of Serapion of Thmuis
- The Service of Love
- The Shepherd's Guild
- The Theology of Giving
- The Voice of Orthodoxy
- The Way of a Pilgrim
- The Word
- The Word (magazine)
- The miracle in Syria
- Theft
- Thekla
- Thekla the Protomartyr
- Themistocles (Adamopoulo)
- Theocletos II (Panagiotopoulos) of Athens
- Theocletus I (Minopoulos) of Athens
- Theoclitos (Triantafilides)
- Theoctiste of Lesbos
- Theoctiste of the Isle of Lesbos
- Theodicy
- Theodora, the Empress
- Theodora (9th century empress)
- Theodora (wife of Justinian)
- Theodora Thessalonica
- Theodora of Arta
- Theodora of Sihla
- Theodora of Thessalonica
- Theodora of Vasta
- Theodore
- Theodore (Nankyama) of Kampala
- Theodore (Nestorović) of Vršac
- Theodore (Rafalsky) of Sydney
- Theodore (Rafanovich)
- Theodore (Rafanovich) of Khymy
- Theodore (disambiguation)
- Theodore Gavras
- Theodore II (Sobhi Baki Soleiman) of Alexandria
- Theodore IV of Antioch
- Theodore I of Rome
- Theodore Rafanovich
- Theodore Trichinas
- Theodore of Novgorod
- Theodore of Pavia
- Theodore of Smolensk
- Theodore of Tarsus
- Theodore of Vrsac
- Theodore the Branded
- Theodore the Sanctified
- Theodore the Stratelates
- Theodore the Studite
- Theodore the Sykeote
- Theodore the Tyro
- Theodoret
- Theodoret of Antioch
- Theodoret of Cyrrhus
- Theodoritos (Polyzogopoulos) of Nazianzos
- Theodoros (Dimitriou) of Heliopolis
- Theodoros (Dimitriou) of Mozambique
- Theodoros (Dridakis) of Babylon
- Theodoros (Nankyama) of Kampala
- Theodoros (Nankyamas) of Kampala
- Theodoros II (Choreftakis) of Alexandria
- Theodoros II of Alexandria
- Theodoros the Great Ascetic
- Theodorus of Jerusalem
- Theodosios (Atallah) Hanna
- Theodosios (Hanna) of Sebastia
- Theodosios (Sideris) of Ancona
- Theodosios Atallah (Hanna)
- Theodosios Attallah (Hanna)
- Theodosios Attallah (Hanna) of Sebastia
- Theodosios I
- Theodosios the Great
- Theodosius (Ivashchenko)
- Theodosius (Ivashchenko) of Seattle
- Theodosius (Lazor) of Washington
- Theodosius (Nagashima) of Japan
- Theodosius (Putilin) of Sydney
- Theodosius I
- Theodosius II
- Theodosius I of Alexandria
- Theodosius VI (Abourjaily) of Antioch
- Theodosius of Japan
- Theodosius of Jerusalem
- Theodosius of Moscow
- Theodosius of the Kiev Caves