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.
- http://www.voskrese.info/spl/patcyril.html

St. Cyril I, the Pillar of the Faith
- Essay on the life and character of Cyril of Alexandria.
- http://www.coptic.net/synexarion/CyrilPillarOfFaith.txt

For All the Saints
- Biography of St. Cyril of Alexandria, known in the Christian East as the Seal of the Fathers.
- http://www.saintpatrickdc.org/ss/0627.htm#cyri

The Ecole Glossary: Cyril of Alexandria
- Short biography, by Elise Bender.
- http://www2.evansville.edu/ecoleweb/glossary/cyrila.html

Orientalis Ecclesiae
- On Saint Cyril, Patriarch of Alexandria. Encyclical of Pope Pius XII, promulgated 1944.
- http://www.papalencyclicals.net/Pius12/P12ORIEN.HTM

Cyril, Saint
- Short, unsympathetic biographical entry on Cyril of Alexandria in the Columbia Encyclopedia.
- http://www.bartleby.com/65/cy/Cyril-St.html

Patron Saints Index: Cyril of Alexandria
- Profile.
- http://www.catholic-forum.com/saints/saintc15.htm

Catholic Encyclopedia: St. Cyril of Alexandria
- Article on this Doctor of the Church, and anti-Nestorian theologian.
- http://www.newadvent.org/cathen/04592b.htm

Vietnamese Eucharistic Youth Society: St. Cyril of Alexandria
- The story of this archbishop. Suitable for children.
- http://www.tntt.org/vni/tlieu/saints/St0627.htm

Cyril, Bishop of Alexandria, Theologian
- Essay on his life and character. With prayer in traditional and contemporary language.
- http://elvis.rowan.edu/~kilroy/JEK/06/27.html