The third split happened in the 11th century. It is called the Great Schism. It was mostly based on the creed being translated incorrectly from Greek into Latin. The disagreements were made worse because the two cultures often did not understand one another. Also, many Crusaders from Western Europe behaved badly. The Christians in Western Europe were led by the Bishop of Rome, known also as the Pope. They are called the Catholic Church. Most Christians in Eastern Europe, Russia, the Middle East and South Asia, and northeast Africa belong to Orthodox, Nestorian, and Miaphysite Christianity, led by the Bishops of other cities or areas.