In a year between 338 and 340, nearly one hundred bishops met at Alexandria, where they declared in favor of Athanasius, rejecting the charges brought against him by the Eusebian faction at the First Synod of Tyre.
[1] This council was a major turning point in the conflict with the Arian movement over issues regarding the Trinity, the Holy Spirit, the human soul of Christ, and God's divinity.
[3] Mild measures were agreed on for those apostate bishops who repented, but severe penance was decreed for the chief leaders of the major heresies.
In 430, Cyril of Alexandria made known to the bishops of Egypt the letter of Pope Celestine I, in which a pontifical admonition was conveyed to the heresiarch Nestorius.
In 633, the patriarch Cyrus of Alexandria held a council in favour of the Monothelites, with which closed the series of these deliberative meetings of the ancient Church of Egypt.