When and where
451 AD in Calcedon (ancient seaport
of Bithynia on the sea
Crisis or controversy
Monophysites were teaching that Christ
had a single divine nature and
no human nature.
Convened: Marcianus, Emperor;
Ratified: Leo I, Pope.
Decrees and resolutions
Declared that Christ had two distinct
natures and was both true
God and true man;
Promulgated canons of church discipline.
ecumenical council, at Chalcedon,
taught Jesus is true God and true man
(Painting by Vasili Ivanovich Surikov)