Saint Peter is a saint in the Christian tradition.
Apostolic succession is the method whereby the ministry of the Christian Church is held to be derived from the apostles by a continuous succession , which has usually been associated with a claim that the succession is through a series of bishops . The Diocese of Rome ( Dioecesis Urbis seu Romana , Diocesi di Roma ) is a diocese of the Catholic Church in Rome . The pope ( papa from πάππας pappas , a child 's word for `` father '' ) , also known as the pontiff , is the Bishop of Rome , and therefore ex officio the leader of the worldwide Catholic Church . Saint Peter . Every 29 June since 1736 , a statue of Saint Peter in St. Peter 's Basilica is adorned with papal tiara , ring of the fisherman , and papal vestments , as part of the celebration of the Feast of Saints Peter and Paul .