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August 5, 2025 21 mins

In part 5 of our series on the 21 Ecumenical Councils, Justin Hibbard discusses what happened at the First Council of Constantinople. What did they accomplish that the Council of Nicaea left incomplete? Which heresies did they address? And why is this council sometimes referred to as an “unecumenical council?”

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SOURCES:

* Episode 146: Introduction to the 21 Ecumenical Councils

* Episode 147: The World that Led to the Council of Nicaea

* Episode 148: The First Council of Nicaea (325)

* Episode 149: From Nicaea to Constantinople

* Map of the Roman Empire Under Constantine

* The Ecumenical Councils of the Catholic Church: A History by Joseph Kelly

* The First Seven Ecumenical Councils (325-787): Their History and Theology by Leo Davis

* History of the Popes Podcast (Series on the Arian Century - beginning with episode 39)

* First Council of Constantinople | Church Councils Explained (Part 2)

* New Advent: First Council of Constantinople

* Papal Encyclicals Online: First Council of Constantinople

* Nicene-Constantinopolitan Creed



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