the Great Schism of 1054, also called East–West Schism, is an event that precipitated the final separation between the Eastern Christian churches (led by the patriarch of Constantinople, Michael Cerularius) and the Western Church (led by Pope Leo IX).
During the great schism in the year 1378, the Roman Catholic Church split when the King of France decided that he did not like the Italian Pope and elected one of his own. The Great Schism, as it has been called, lasted for about 68 years, during which time there were two popes claiming authority over the Catholic Church.
