Catholic theology
Catholic belief holds that the church exists both on earth and in heaven simultaneously, and thus the Virgin Mary and the saints are alive and part of the living church. Prayers and devotions to Mary and the saints are common practices in Catholic life. These devotions are not worship, since only God is worshiped. The church teaches that the saints "do not cease to intercede with the Father for us. ... So by their fraternal concern is our weakness greatly helped."
Catholic Church in Europe
According to the Catholic tradition, Saint Peter, one of the Twelve Apostles of Jesus Christ and leader of the early church, was crucified and buried in Rome under Emperor Nero Augustus Caesar. On the place supposed to be the burial site of Saint Peter the Saint Peter's Basilica was built. Rome is also the residence city of the Pope, the leader of the Catholic Church, who at the same time is also the Bishop of Rome. Until today the Pope rules over an ecclesiastical state, the Vatican City, which encompasses 44 hectares of the city area. Rome hosts also the Papal Major basilicas. Besides the Saint Peter's Basilica there are three other Major basilicas: Archbasilica of Saint John Lateran, Basilica of Saint Paul Outside the Walls and Basilica di Santa Maria Maggiore.