When and where
431 AD in Ephesus
Crisis or controversy
Nestorius was teaching that Mary was
not the mother of God;
Proponents of Nestorius began claiming
that Christ was actually two separate
persons, human and divine.
Convened: Theodosius II, Emperor;
St. Cyril of Alexandria;
St. John Chrysostom;
Ratified: Celestinus I, Pope.
Decrees and resolutions
Decreed that Mary was also
, mother of God;
Declared that Christ is true God and true man, that he has two
natures (human and divine) joined in one person.
Basilica of St. John at Ephesus