Cyril of Alexandria

c. 376 – 444 · Alexandria

Biography

Patriarch of Alexandria and leading voice at the Council of Ephesus (431) against Nestorius.

“One is the Christ, both before and after the incarnation.”
— On the Unity of Christ

Writings

  • On the Unity of Christ
  • Twelve Anathemas
  • Commentary on John

Influence

Set the terms of Christological orthodoxy honored by Chalcedonian and Oriental Orthodox alike.