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- Theodotus of Cyrenia
- Theofilos (Manolis) of Lefkas
- Theognostus the Greek
- Theoklitos (Avrantinis) of Aetolia
- Theoklitos (Koumarianos) of Thessaliotis
- Theoklitos (Koumarianos) of Vresthena
- Theoklitos (Passalis) of Florina
- Theoklitos (Setakis) of Ioannina
- Theoleptus II of Constantinople
- Theoleptus I of Constantinople
- Theologian
- Theological School of Halki
- Theological School of Patmos
- Theologos (Apostolidis) of Serres
- Theologos (Chrysanthakopoulos) of Brazzaville
- Theophan (Noli) of Durres
- Theophan (Prokopovich) of Novgorod
- Theophan Noli
- Theophan the Greek
- Theophan the Recluse
- Theophanes (Il'minskii)
- Theophanes (Il'minskii) of Solikamsk
- Theophanes (Kim) of Kyzyl
- Theophanes III of Jerusalem
- Theophanes the Confessor
- Theophanes the Confessor of Sigriane
- Theophanes the New
- Theophany
- Theophilos (Ionescu)
- Theophilus (Ionescu) of Sèvres
- Theophilus (Pashkovsky) of San Francisco
- Theophilus III (Giannopoulos) of Jerusalem
- Theophilus III (Jannopoulos) of Jerusalem
- Theophilus III (Yiannopoulos) of Jerusalem
- Theophilus III of Jerusalem
- Theophilus II (Pankostas) of Alexandria
- Theophilus II of Alexandria
- Theophilus I of Jerusalem
- Theophilus of Alexandria
- Theophilus of Antioch
- Theophilus of New York
- Theophilus the Iconclast
- Theophilus the Iconoclast
- Theophylact of Ochrid
- Theophylact of Ohrid
- Theophylactos (Georgiadis) of Jordan
- Theophylactos (Papathanasopoulos) of Australia and New Zealand
- Theophylactus (Lecapenus) of Constantinople
- Theophylactus of Nicomedia
- Theophylactus of Ohrid
- Theophylaktos (Tzoumerkas) of Tripoli
- Theosebia the Deaconess
- Theosis
- Theotokion
- Theotokonimia
- Theotokonymia
- Theotokos
- Theotokos Iverskaya
- Theotokos of Pochayiv
- Theotokos of Tikhvin
- Theotokos of Vladimir
- Theotokos of the Passion
- Theotokos the Unburnt Bush icon
- Theotychus of Alexandria
- Therapont of Sardis
- Thessalonica
- Third All-Diaspora Council
- Third Class Feasts
- Third Council of Constantinople
- Third Ecumenical Council
- Third Finding of the Head of St. John the Forerunner
- Third Hour
- Third Rome
- This was from me
- Thomais of Alexandria
- Thomas
- Thomas (Joseph) of Charleston and Oakland
- Thomas (Joseph) of Oakland
- Thomas (disambiguation)
- Thomas Aquinas
- Thomas Hopko
- Thomas II of Constantinople
- Thomas I of Constantinople
- Thomas I of Jerusalem
- Thomas of Mabugh
- Three Hierarchs
- Three Holy Children
- Three Holy Hierarchs
- Three Holy Youths
- Thrice-Holy Hymn
- Thrones
- Thyatira
- Thyranoixia
- Tikhon
- Tikhon (Fitzgerald) of San Francisco and Los Angeles
- Tikhon (Khvorostinin) of Kazan
- Tikhon (Mollard)
- Tikhon (Mollard) of Philadelphia
- Tikhon (Mollard) of Washington
- Tikhon (Troitsky) of San Francisco
- Tikhon (Voinov) of Kazan
- Tikhon III (Voinov) of Kazan
- Tikhon II of Kazan
- Tikhon I (Khvorostinin) of Kazan
- Tikhon of Moscow
- Tikhon of Zadonsk
- Tikhvinskaya
- Timeline of Church History
- Timeline of Church History: Ante-Nicene Era (100-325)
- Timeline of Church History: Apostolic Era (33-100)
- Timeline of Church History: Apostolic era (33-100)
- Timeline of Church History: Byzantine Era (451-843)
- Timeline of Church History: Communist Era (1917-1991)
- Timeline of Church History: Late Byzantine Era (843-1453)
- Timeline of Church History: Modern Era (1821-1917)
- Timeline of Church History: New Testament Era
- Timeline of Church History: Nicene Era (325-451)
- Timeline of Church History: Post-Communist Era (1991-Present)
- Timeline of Church History: Post-Imperial Era (1453-1821)
- Timeline of Church History (Ante-Nicene Era (100-325))
- Timeline of Church History (Apostolic Era (33-100))
- Timeline of Church History (Byzantine Era (451-843))
- Timeline of Church History (Communist Era (1917-1991))
- Timeline of Church History (Late Byzantine Era (843-1054))
- Timeline of Church History (Late Byzantine Era (843-1453))
- Timeline of Church History (Modern Era (1821-1917))
- Timeline of Church History (New Testament Era)
- Timeline of Church History (Nicene Era (325-451))
- Timeline of Church History (Post-Communist Era (1991-Present))
- Timeline of Church History (Post-Imperial Era (1453-1821))
- Timeline of Church History (Post-Roman Schism (1054-1453))
- Timeline of Oriental Orthodoxy in India (St. Thomas Christianity)
- Timeline of Orthodox Church and Roman Catholic relations
- Timeline of Orthodoxy in America
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- Timeline of Orthodoxy in Britain
- Timeline of Orthodoxy in China
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- Timeline of Orthodoxy in Greece
- Timeline of Orthodoxy in Ireland
- Timeline of Orthodoxy in Japan
- Timeline of Orthodoxy in New Zealand
- Timeline of Orthodoxy in Russia
- Timeline of Orthodoxy in Scotland
- Timeline of Orthodoxy in Wales
- Timeline of Orthodoxy in the British Isles
- Timeline of Orthodoxy in the United Kingdom
- Timeline of Saints
- Timeline of Schisms
- Timeline of Schisms in the Church
- Timeline of Twentieth century saints
- Timotheos (Evangelinidis) of Australia and New Zealand
- Timotheos (Evangelinidis) of Rhodes
- Timotheos (Margaritis) of Bostra
- Timothy, Agapius and Thekla of Palestine
- Timothy (Negrepontis) of Detroit
- Timothy (disambiguation)
- Timothy III (Papoutsakis) of Crete
- Timothy III Salofacioius of Alexandria
- Timothy II Aelurus of Alexandria
- Timothy II of Constantinople
- Timothy IV of Alexandria
- Timothy I of Alexandria
- Timothy I of Constantinople
- Timothy Ware
- Timothy and Maura
- Timothy and Mavra
- Tithe
- Tithes and Firstfruits
- Titular bishop
- Titus (Papanakos) of Paramythia
- To Vema
- Tobit
- Tokyo Orthodox Seminary (Tokyo, Japan)
- Tolgsk icon of the Mother of God
- Tomos
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- Ukaz No. 362
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- VLADIMIR
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- Valerie A. Karras
- Varlaam (Novakshonoff) of Vancouver
- Varlaam Monastery (Meteora)
- Varnava (Nastic)
- Varnava (Prokofiev) of Cannes
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- Vartan the Warrior
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- Vasilios (Kolokas) of Elassona
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- Victor (Abo-Assaley) of New York
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- Victor (Svyatin) of Krasnodar and Kuban
- Victor I of Rome
- Victor Pokrovsky
- Victor Pokrovsky of Japan
- Victor Vladimirovich Sokolov
- Victor of Milan
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- Vikentije II of Serbia
- Vikentije of Serbia
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- Virtue
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- Vitalian of Rome
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- Vitalius I of Antioch
- Vitalius the Venerable
- Vitaly (Maximenko) of Jersey City
- Vitaly (Ustinov)
- Vitaly (Ustinov) of Montreal
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- Vlad the Impaler
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- Vladimir (Bogoyavlensky) of Kiev
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- Vladimir (Guettée)
- Vladimir (Ivanov) of Slava
- Vladimir (Nagosky) of Japan
- Vladimir (Nagosky) of San Francisco