Oriental Orthodoxy is the fourth largest communion of Christian churches, with 76 million members worldwide. Oriental Orthodoxy is a Miaphysite form of Christianity, rejecting the separation of Jesus' divine and human natures, and arguing that they have always been, and will always be, one and the same. It was founded after the 451 AD Council of Chalcedon, disagreeing with the council's conduct; however, it believes in apostolic succession and is only semantically different from the Catholic Church. The majority of Oriental Orthodox Christians live in Ethiopia, Egypt, Eritrea, and Armenia.