Council of Constantinople
- Anthimus I of Constantinople
- Catholicisation
- Constantinople
- Council of Blachernae (1157)
- Council of Chalcedon
- Council of Constantinople (1094)
- Council of Constantinople (1285)
- Council of Constantinople (1872)
- Council of Constantinople (1923)
- Council of Constantinople (360)
- Council of Constantinople (518)
- Council of Constantinople (536)
- Council of Constantinople (815)
- Council of Constantinople (843)
- Council of Constantinople (861)
- Council of Constantinople (867)
- Council of Florence
- Council of Hieria
- Cyril Lucaris
- East–West Schism
- Encyclical of the Eastern Patriarchs
- Eunomius of Cyzicus
- Fifth Council of Constantinople
- Filioque
- First Council of Constantinople
- Fourth Council of Constantinople (Catholic Church)
- Fourth Council of Constantinople (Eastern Orthodox)
- Gregorian calendar
- Hesychast controversy
- Ignatios of Constantinople
- In Suprema Petri Apostoli Sede
- Istanbul, Turkey
- John Italus
- Leo of Chalcedon
- Moscow Patriarchate
- Origen of Alexandria
- Papal supremacy
- Patriarch of Antioch
- Photios I
- Photios I of Constantinople
- Quinisext Council
- Revised Julian calendar
- Second Council of Constantinople
- Second Council of Lyon
- Soterichos Panteugenos
- Synod of Constantinople (1484)
- Synod of Constantinople (543)
- Theodosius I
- Third Council of Constantinople
- Triumph of Orthodoxy