Council of Constantinople (861)

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The Council of Constantinople of 861, also known as Protodeutera, was a major Church Council, convened upon the initiative of Emperor Michael III of Byzantium and Patriarch Photios I of Constantinople, and attended by legates of Pope Nicholas I. The Council confirmed the deposition of former Patriarch Ignatius of Constantinople, and his replacement by Photios.^[1] Several dogmatic, ecclesiological and liturgical questions were also discussed, and seventeen canons were produced.^[2] Decisions of the Council were initially approved by papal legates, but their approval was later annulled by the Pope.^[3] In spite of that, the Council is considered as valid by the Eastern Orthodox Church.