According to Catholic tradition, Jesus founded the papacy in the first century, when he chose St. Peter, the leader of the apostles, to be his earthly representative. "Thou art Peter and upon this rock I will build my church," he states in chapter 16 of Matthew. "I will give to thee the keys of the kingdom of heaven." Those words, which now circle the dome of St. Peter's Basilica in Rome, serve as the biblical mandate for the papacy. All popes are considered symbolic descendants of Peter and are thought to hold "Peter's Chair"

Since then, there have been more than 260 occupants of the papal office. The institution has endured through the defining moments of European history, including the split of the Roman Empire, the bloodbath of the crusades and the rise of the Italian Renaissance. More recently, popes have struggled to reconcile the strict traditions of doctrinaire Catholicism with the realities of modern life, including defending firm stances against abortion and the death penalty. Here, a short history of some of the most notable occupants of "St. Peter's Chair."