text: Seventh-day Adventists teach that the Little Horn Power which as predicted rose after the breakup of the Roman Empire is the papacy. In 533 AD Justinian, the emperor of the Eastern Roman Empire, legally recognized the bishop (pope) of Rome as the head of all the Christian churches. Because of the Arian domination of some of the Roman Empire by the barbarian tribes, this authority could not be exercised by the bishop of Rome. Finally, in 538 AD, Belisarius, one of Justinian's generals, routed the Ostrogoths, the last of the barbarian kingdoms, from the city of Rome and the bishop of Rome could begin establishing his universal civil authority. So, by the military intervention of the Eastern Roman Empire, the bishop of Rome became all-powerful throughout the area of the old Roman Empire.
  Like many reformation-era Protestant leaders, the writings of Adventist pioneer Ellen White speak against the Catholic Church as a fallen church and in preparation for a nefarious eschatological role as the antagonist against God's true church and that the pope is the Antichrist. Many Protestant reformers such as Martin Luther, John Knox, William Tyndale and others held similar beliefs about the Catholic Church and the papacy when they broke away from the Catholic Church during the Reformation.
  Ellen White writes,