Dioscorus of Alexandria

Robber Council of Ephesus (Latrocinium) - Dioscorus presides, Eutyches vindicated, St. Flavian beaten and dies from injuries

Council of Chalcedon - defines Christ's two natures in one person, deposes Dioscorus, establishes Chalcedonian Definition

Deaths of Eutyches and Dioscorus - both die in exile unrepentant, Monophysite heresy continues