6. The Filioque Controversy
- The Encyclical Letter of Saint Photius (867 or 866)
- The First Letter of Michael Cerularius to Peter of Antioch (1054)
- Council of Blachernae: Exposition of the Tomus of Faith Against Beccus Patriarch Gregory II of Cyprus (1285)
- The Encyclical Letter of Saint Mark of Ephesus (1440[39]-1441)
Together with the "The Epitomes of the Mystagogy of the Holy Spirit"
7. The Hesychast Controversy
8. The Post Byzantine Era
- The [two] Confession of Faith by Gennadius, Patriarch of Constantinople (1455[53]-1456)
- The Replies of Jeremias the Second to the Lutherans (1573-1581)
- The Confession of Faith by Metrophanes Kritopoulos (1625)
- Synods of Constantinople (1672 & 1691) - Responsio Dionysii & On the Eucharist
- The Confession of Dositheus (1672) ratified by the Decrees of the Synod of Jerusalem
- The Answers of the Orthodox Patriarchs to the Non-Jurors (1718, 1723)
aka: The Encyclical of the Eastern Patriarchs on the Orthodox Faith, Patriarch Jeremiah III of Constantinople answer to the "Anglican Anomots" (1716-1725)
9. Russian Confessions
- The Orthodox Confession by Peter of Moghila (1642[43]), in its revised form ratified by the Council of Jassy (1662)
- The Orthodox Christian Catechism of Metropolitan Philaret of Moscow (1823)
10. The Unity of the Church and Ecumenism
- The Reply of the Orthodox Patriarchs to Pope Pius the IX (1848)
- The Reply of the Synod of Constantinople to the Papal Encyclical of Pope Leo XIII (1895) on Reunion
- The Encyclical Letters of the Athonite Elders on Ecumenism (1993-1999)