Key Facts:
Date October and November, 451
Location Chalcedon
Number of Participants 520
Summoned by Emperor Marcian of the Byzantine Empire
Chaired by Anatolius, Patriarch of Constantinople
Key Participants Pope Leo I (by proxy), Dioscorus of Alexandria, Anatolius of Constantinople
Purpose To define orthodox catholic doctrine in opposition to monophysite heresy and to enact church discipline.
Key Events The reading of and subscription to Leo’s Tome; deposition of Dioscorus; exile of Eutyches; Canonization of Flavian

Surviving Documents:

The full proceedings of the council can be found in the Acta Conciliorum Oecumenicorum; our index for the proceedings can be found here.

Bibliography:

Created by SCD

Last Update: 2-29-2020

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