"On July 16, 1054, Patriarch of Constantinople Michael Cerularius was excommunicated, starting the “Great Schism” that created the two largest denominations in Christianity—the Roman Catholic and Eastern Orthodox faiths ..."
"The East-West schism was a theological rift that developed during the medieval period and eventually resulted in the division of the Christian church into the Roman Catholic Church of the West and the Eastern Orthodox Church of the East. This rift was the result of many different factors ... "
"The Great Schism, also called the East-West Schism, divided Christendom into Western (Latin) and Eastern (Greek) branches, which then became the Roman Catholic Church and the Eastern Orthodox Church, respectively ... "