Cyril of Alexandria

370–380 to 444 · Doctor 1882

Origin: Alexandria or its vicinity, probably
Historical identity: Greek-speaking Egyptian / Eastern Roman
Affiliation: Secular clergy / no religious order

Life and work

Patriarch of Alexandria and a principal figure in fifth-century Christological disputes. He defended the unity of Christ and the title Theotokos, especially at the Council of Ephesus.

Places and activities

Alexandria

412-444; with travel

Governed the Alexandrian church and wrote theology and biblical commentaries.

Benedict XVI: Cyril of Alexandria

Ephesus

431

Presided over the council's anti-Nestorian proceedings.

Benedict XVI: Cyril of Alexandria

Catholic Encyclopedia

Catholic Encyclopedia: St. Cyril of Alexandria

Primary sources

Further reading

Wikipedia

Cyril of Alexandria

Dates and research notes

Years are historical biographical dates; an approximate label on a place record remains approximate.

Selected sourced locations; not a complete itinerary. All geographic coordinates are approximate.

Lifetime associations, not citizenship or a claim that all affiliations were held simultaneously.

Official modern biographical overview; not contemporary evidence for the saint's travels.

The Catholic Encyclopedia, 1908. Biographical article.

Primary letters in an older translated council collection; consult modern editions for textual questions.

Oxford University Press, 2011. Recommended reference; consult the relevant entry and its bibliography. Not treated as read evidence for individual seed claims.

Updated 2026-11-01