1 min read 146 words Updated Sep 05, 2026 Created Sep 05, 2026
#church-history#councils#theology#tier2

Council of Chalcedon (451)

Background

Key figures

What was condemned

Eutychianism / Monophysitism (Christ's human nature absorbed into the divine)

What was defined

Christ is one Person in two natures (divine and human), unconfused, unchanged, undivided, unseparated — the Chalcedonian Definition

Aftermath and reception

Primary sources

  • Full primary texts (definition + canons, NPNF2-14): chalcedon_451

Reading notes