579:

Pelagius II becomes Pope

When assistance from Emperor Tiberius II of Byzantium was not forthcoming, Pelagius convinced the Christian Franks to defend Rome from encroaching Lombards. He attempted to end a schism in the Church over the Three Chapters Controversy and began a controversy of his own when St. John IV the Faster, bishop of Constantinople, assumed the title of "ecumenical patriarch" (a position that made him the equal of Pelagius, if not his superior). Pelagius was also responsible for building projects in Rome and turned his home into a hospital that was of great assistance when the city was struck by a disastrous flood. He himself died of the plague.