The Second Ecumenical Church Council of Constantinople/Istanbul (AD 381)

The second Ecumenical Church Council was convened by emperor Theodosius I in 381. Approximately 150 bishops from the Greek eastern church met together in Constantinople’s Church of Holy Peace (Hagia Irene) from May to July. The Roman Catholic Church sent no representatives. The council was led by bishop Meletius, bishop Gregory the Theologian, and bishop Nectarius. The council condemned the teaching of Arianism, and wrote the final version of the Nicene Creed.