|Catholic Encyclopedia: St. Cyril of Alexandria - Article on this Doctor of the Church, and anti-Nestorian theologian.
||Cyril, Bishop of Alexandria, Theologian - Essay on his life and character. With prayer in traditional and contemporary language.
|Cyril, Saint - Short, unsympathetic biographical entry on Cyril of Alexandria in the Columbia Encyclopedia.
||The Ecole Glossary: Cyril of Alexandria - Short biography, by Elise Bender.
|For All the Saints - Biography of St. Cyril of Alexandria, known in the Christian East as the Seal of the Fathers.
||Orientalis Ecclesiae - On Saint Cyril, Patriarch of Alexandria. Encyclical of Pope Pius XII, promulgated 1944.
|Patron Saints Index: Cyril of Alexandria - Profile.
||St. Cyril I, the Pillar of the Faith - Essay on the life and character of Cyril of Alexandria.
|St. Cyril of Alexandria, the Twenty-Fourth Patriarch - By Severus of Al-Ushmanain. Late tenth-century life of St. Cyril the Great, translated from the Arabic.
||Vietnamese Eucharistic Youth Society: St. Cyril of Alexandria - The story of this archbishop. Suitable for children.