when did the orthodox and catholic church split
East–West Schism The Eastâ€“West Schism, also called the Great Schism and the Schism of 1054, was the break of communion between what are now the Catholic Church and Eastern Orthodox churches, which has lasted since the 11th century.[1]
Byzantine Empire In 1054, relations between the Eastern and Western traditions within the Christian Church reached a terminal crisis, known as the East–West Schism. Although there was a formal declaration of institutional separation, on July 16, when three papal legates entered the Hagia Sophia during Divine Liturgy on a Saturday afternoon and placed a bull of excommunication on the altar,[106] the so-called Great Schism was actually the culmination of centuries of gradual separation.[107] Unfortunately the legates did not know that the Pope had died, an event that made the excommunication void and the excommunication only applied to the Patriarch who responded by excommunicating the legates.