St. Cyril was born in Alexandria, Egypt, in 376. This monk and priest became bishop of Alexandria in 412 and later became patriarch of the city. He worked at the Council of Ephesus to fight the heretic Nestorius who said that within Christ there were two persons. St. Cyril also wrote a book against Julian the Apostate, a Roman emperor who worked against Christianity. St. Cyril, a doctor of the church, died in 444. He is patron saint of Alexandria.