Pope Leo IX excommunicated Patriarch Michael Cerularius of Constantinople, who, in turn, excommunicated Pope Leo in 1054 AD. This was caused because of disagreements over the unauthorized changes made by Pope Leo to the Nicene Creed (by adding the "Filioque clause"). The Orthodox Church maintains that Holy Spirit "proceeds from the Father alone, whereas the Roman Catholics claimed that the Holy Spirit proceeds from the Father "and the Son" which goes against The Bible. "The Bible states that ...the Spirit of truth who proceeds from the Father..." (John 15:26).
However, both of these excommunications were mutually removed in 1965 by Pope Paul VI and Patriarch Athenagoras I.
Michael I Cerularius died in 1059.
This was done during the Great Schism in which the Eastern and Western Churches excommunicated each other.
The Great Eastern Schism in 1054. The pope and the patriarch mutually excommunicated each other.
By the time, Great Schism the patriarch of Contantinople named Michael Cerularius dispute with Pope Leo IX. They differed with Roman church in their Eucharist. They do not use unleavened bread.
Patriarch Michael II of Antioch died in 1312.
Patriarch Michael IV of Constantinople died in 1212.
Roman Catholic AnswerThe Eastern Schism was centuries in the making but became fixed in 1054, when the Patriarch of Constantinople, Michael Cerularius was excommunicated by the papal legates for opposing the use of leavened bread by the Latin Church and removing the Pope's name from the diptychs to be prayed for in the Eucharistic liturgy. from Modern Catholic Dictionary by John A. Hardon, S.J. Doubleday & Co., Inc. Garden City, NY 1980
The cast of The Patriarch - 2013 includes: Michael Barkhorder as Derek Ej Neil as Leon
Venance Grumel has written: 'The schism of Michael Cerularius in 1054' -- subject(s): Eastern and Western Church, Schism
Another answer from our community:because despite leo's arguments many church leaders in esatern europe most notably the byzantine patriarch michael cerularius refused to recognize the supremacy of the pope
The Pope excommunicated Galileo.
A Byzantine Patriarch is an alternative name for the Ecumenical Patriarch of Constantinople.