Humbert of Silva Candida, O.S.B., also known as Humbert of Moyenmoutier was a French Benedictine abbot and later cardinal. It was his act of excommunicating the Patriarch of Constantinople, Michael I
The East–West Schism, also known as the Great Schism or the Schism of 1054, is the break of communion between the Catholic Church and the Eastern Orthodox Church since 1054. A series of ecclesiastical
Hagia Sophia, the cathedral of Constantinople at the time of the schism
Icon depicting the Emperor Constantine (centre) and the bishops of the First Council of Nicaea (325) holding the Niceno–Constantinopolitan Creed of 381
The division between the Eastern and Western Churches
Commemorative tablet of Catholic-Orthodox prayer at Saint Peter's Basilica, commemorating the meetings held between Pope Paul VI and Patriarch Athenagoras in 1967, and between Pope John Paul II and Patriarch Demetrios I of Constantinople in 1987.