The independence of the Roman Church also furthered its development. The bishop of Rome was the sole patriarch in the West, while in the East there were two, and later four patriarchs, each exercising authority in religious matters. Furthermore, the removal of the capital from Rome to Constantinople helped to free the Roman bishop from the close oversight of the imperial government. He was able, henceforth, to promote the interests of the church under his control without much interference on the part of the eastern emperor. THE ROMAN CHURCH ORTHODOX Finally, it must be noted how much the development of the Roman Church was aided by its attitude on disputed questions of belief. While eastern Christendom was torn by theological controversies, the Church of Rome stood firmly by the Nicene Creed. [13] After the Arian, Nestorian, and other heresies were finally condemned, orthodox Christians felt indebted to the Roman Church for its unwavering championship of "the faith once delivered to the saints." They were all the more ready, therefore, to defer to that church in matters of doctrine and to accept without question its spiritual authority. THE PETRINE SUPREMACY The claim of the Roman bishops to supremacy over the Christian world had a double basis. Certain passages in the New Testament, where St. Peter is represented as the rock on which the Church is built, the pastor of the sheep and lambs of the Lord, and the doorkeeper of the kingdom of heaven, appear to indicate that he was regarded by Christ as the chief of the Apostles. Furthermore, a well-established tradition made St. Peter the founder of the Roman Church and its first bishop. It was then argued that he passed to his successors, the popes, all his rights and dignity. As St. Peter was the first among the Apostles, so the popes were to be the first among bishops. Such was the doctrine of the Petrine supremacy, expressed as far back as the second century, strongly asserted by many popes during the Middle Ages, and maintained to-day by the Roman Church. 123. GROWTH OF THE PAPACY PONTIFICATE OF LEO I, 440-461 A.D. Up to the middle of the fifth century about forty-five bishops had occupied St. Peter's chair at Rome. The most eminent these was Leo the Great. When he became bishop, the Germans were overrunning the western provinces of the empire. The invaders professed the Arian faith, as we have seen, and often persecuted the orthodox Christians among whom they settled. At such a time, when the imperial power was growing weaker, faithful Catholics in the West naturally turned for support to the bishop of Rome. Leo became their champion against the barbarians. Tradition declares that he succeeded in diverting Attila from an attack on Rome, and when the Vandals sacked the city Leo also intervened to prevent its destruction. [14] PONTIFICATE OF GREGORY I, 590-604 A.D.