Title: The ecclesiology of St. Nicephorus I (758-828), Patriarch of Constantinople: pentarchy and primacy
Subjects: Church, History of doctrines, Church history, Patriarchs and patriarchate, Bishops, Relations, Catholic Church, Orthodox Eastern Church, Ecumenical Councils and synods, Council of Nicaea (2nd : 787 : Nicaea, Turkey), Easter Synod of Hagia Sophia (815)
People: Nicephorus Saint, Patriarch of Constantinople
Time periods: Middle Ages, 600-1500