When the Catholic and Orthodox churches split (the date is usually given as 1054, but the schism was a protracted affair), the Patriarch of Constantinople, then the capital of the Byzantine Empire, ...

If the Russian Orthodox Church does end up fully schisming from Constantinople, it would represent the most significant break in the Eastern Church since 1054 AD.

On October 15, Moscow cut ties with Constantinople, severing the world’s largest Orthodox church from its historic home. Russia accounts for roughly half of Orthodoxy’s 300 million believers ...

MOSCOW — Vyacheslav Gorshkov, who teaches the catechism at a Kiev cathedral, was among the majority of Orthodox Christians in Ukraine who had reconciled themselves to the fact that their church ...

So there was always a danger of miscommunication. And in 1054 itself, there was friction between the papal delegate, Cardinal Humbert, and the patriarch of Constantinople.

The Synod of Russian Orthodox Church made the decision to completely break off the relations with Ecumenical Patriarchate of Constantinople in response to it's process of granting autocephaly, or ...

CNA Newsroom, Mar 15, 2025 / 08:00 am. Ecumenical Patriarch Bartholomew I of Constantinople on Wednesday offered a hopeful historical assessment of the traditional 1054 date for the “Great ...