Patriarchate of Constantinople (disambiguation)
- Andrew the Apostle
- Armenian Catholic Archeparchy of Istanbul
- Armenian Patriarch of Constantinople
- Armenian Patriarchate of Constantinople
- Autocephalous Turkish Orthodox Patriarchate
- Byzantium
- Constantinople
- Eastern Orthodox Church
- Ecumenical Patriarch of Constantinople
- Ecumenical Patriarchate of Constantinople
- Greek Catholic Apostolic Exarchate of Istanbul
- History of Early Christianity
- Istanbul
- Latin Patriarchate of Constantinople
- List of Armenian patriarchs of Constantinople
- List of ecumenical patriarchs of Constantinople
- Melkite Greek Catholic Patriarchal Exarchate of Istanbul
- Patriarchate of Alexandria (disambiguation)
- Patriarchate of Jerusalem (disambiguation)
- Pentarchy
- Turkey