Council · 431 · 22 June

Council of Ephesus

The question at Ephesus was simple to state, even if hard to settle: when Mary gave birth to Jesus, was the one she bore truly God in human flesh? Nestorius disliked calling Mary 'God-bearer' because he feared it blurred Jesus' humanity and divinity. Cyril of Alexandria argued that refusing the title split Jesus into two too sharply. The council agreed with Cyril: Jesus is one person, the eternal Son who truly became human. The debate was not mainly about Mary; it was about who Jesus is.

At a glance

Type: Council
Date remembered: 22 June, AD 431
What kind of event is this?: A council or settlement that changed the church's public teaching, discipline, or historical direction.
Key line: The one born of Mary is God who became human.

Highlights

Nestorius was removed as bishop.
Mary was affirmed as 'God-bearer.'
Cyril's teaching 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.

Aftermath

The condemnation of Nestorius deepened divisions with Antiochene and Persian Christian communities.

People in the story

Cyril of Alexandriac. 376 – 444Patriarch of Alexandria. Chief architect of Christological orthodoxy; presided over the Council of Ephesus (431) which condemned Nestorius.

Nestoriusc. 386 – c. 451Archbishop of Constantinople (428-431). Condemned at Ephesus (431) for distinguishing two persons in Christ and denying the title Theotokos. Heretic.