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Chalcedonian Churches
Byzantine, Latin, and later Western traditions
Church History
✦451 and after
Chalcedon and the Oriental Orthodox Split
The Council of Chalcedon clarified Christ's two natures for the Byzantine world, while several ancient churches rejected the definition and continued as the Oriental Orthodox traditions.
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The Council of Chalcedon (451)
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Oriental Orthodox Churches
Coptic, Syriac, Armenian, Ethiopian, Eritrean, and Malankara traditions
Key Question
How should the one incarnate Christ be confessed so that both His full divinity and full humanity are protected?
Chalcedonian Definition
One and the same Christ, Son, Lord, and only-begotten, acknowledged in two natures, without confusion, change, division, or separation.
Oriental Orthodox Continuity
The non-Chalcedonian churches remained ancient apostolic communities with their own liturgical, linguistic, and theological traditions.
Why Chalcedon Was Called
The church needed language that would protect both Christ's full divinity and full humanity.
The controversy after Ephesus and the Christological debates of the fifth century forced the bishops to say more precisely how the incarnate Son should be confessed. Chalcedon answered against both confusion of natures and separation of persons.
The Chalcedonian Definition
The council taught one and the same Christ, Son, Lord, and only-begotten, acknowledged in two natures.
The definition was meant to preserve the unity of Christ's person while safeguarding the integrity of His divinity and humanity. It became standard for Byzantine, Latin, and many later Protestant traditions.
Reception and Division
Some ancient churches rejected Chalcedon and continued as the Oriental Orthodox communions.
The split was not simply a matter of politics or a quick misunderstanding. It was a real Christological disagreement that developed into separate ecclesial histories. The Coptic, Syriac, Armenian, Ethiopian, Eritrean, and Malankara churches should be read as continuing ancient apostolic traditions, not as modern offshoots.