In 1054 AD, mutual excommunications were issued between the Pope’s representatives and the Patriarch of Constantinople. This event severed Christendom in two. The West became the Roman Catholic Church, while the East remained the Orthodox Church. For the Orthodox, the Church did not "split" in half; rather, the West broke away from the unity of the five ancient Patriarchates (Rome, Constantinople, Alexandria, Antioch, and Jerusalem). To this day, Orthodoxy maintains that it is the One, Holy, Catholic, and Apostolic Church in its original form.