Council · Today in 431
Council of Ephesus

Ephesus forced the church to say whether the one born of Mary is truly the eternal Son made flesh. Nestorius resisted the title Theotokos, 'God-bearer,' because he feared it confused Christ's divinity and humanity. Cyril of Alexandria argued that refusing the title divided Christ too sharply. The council sided with Cyril: Mary bore the one person of the Word incarnate, not a merely human partner joined to God.
Mary bore the Word made flesh.
Highlights
- Nestorius was deposed.
- Theotokos was affirmed.
- Cyril's Christology carried the council.
- The controversy shaped later Eastern divisions.
How it happened
What happened
The council deposed Nestorius after a bitter conflict with Cyril of Alexandria.
The argument
Was Mary Theotokos, God-bearer, or only Christotokos, Christ-bearer? The real issue was the unity of Christ.
What changed
The council affirmed Theotokos because the one born of Mary is the Word incarnate.
Why it matters
Ephesus protected the claim that Jesus is one Lord, not a loose partnership between a divine person and a human person.
People in the story
Cyril of AlexandriaPatriarch of Alexandria. Chief architect of Christological orthodoxy; presided over the Council of Ephesus (431) which condemned Nestorius.
NestoriusArchbishop of Constantinople (428-431). Condemned at Ephesus (431) for distinguishing two persons in Christ and denying the title Theotokos. Heretic.
Book of the day
On the Unity of Christ
Cyril of AlexandriaA reading pick tied to today's figure, quote, era, or event. The best short entry into the Nestorian controversy and why 'one Christ' mattered so much.
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