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The Fourth Council of Constantinople, the eighth Catholic Ecumenical Council, was convened to discuss the patriarchate of Photios I of Constantinople.
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Fourth Council of Constantinople (Catholic Church)
8th ecumenical council of the Catholic Church (869–870 AD)
The Fourth Council of Constantinople was the eighth ecumenical council of the Catholic Church held in Constantinople from 5 October 869, to 28 February 870. It was poorly attended, the first session by only 12 bishops and the number of bishops later never exceeded 103. In…Source: Wikipedia (CC BY-SA)
Catholic ecumenical councils
Ecumenical council recognized by the Catholic Church
According to the Catholic Church, a Church Council is ecumenical ("world-wide") if it is "a solemn congregation of the Catholic bishops of the world at the invitation of the Pope to decide on matters of the Church with him". The wider term "ecumenical council" relates to Church…Source: Wikipedia (CC BY-SA)
Patriarchate
Jurisdiction and office of an ecclesiastical patriarch
Patriarchate is an ecclesiological term in Christianity, referring to the office and jurisdiction of a patriarch.Source: Wikipedia (CC BY-SA)
Photios I of Constantinople
Ecumenical Patriarch of Constantinople from 858 to 867 and from 877 to 886
Photios I of Constantinople, also spelled Photius, was the Ecumenical Patriarch of Constantinople from 858 to 867 and from 877 to 886. He is recognized in the Eastern Orthodox Church as Saint Photius the Great.Source: Wikipedia (CC BY-SA)