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."
Rome
Much like the rest of Italy, Rome is predominantly Roman Catholic, and the city has been an important centre of religion and pilgrimage for centuries, the base of the ancient Roman religion with the pontifex maximus and later the seat of the Vatican and the pope. Before the arrival of the Christians in Rome, the Religio Romana (literally, the "Roman Religion") was the major religion of the city in classical antiquity. The first gods held sacred by the Romans were Jupiter, the most high, and Mars, god of war, and father of Rome's twin founders, Romulus and Remus, according to tradition. Other gods and goddesses such as Vesta and Minerva were honoured. Rome was also the base of several mystery cults, such as Mithraism. Later, after St Peter and St Paul were martyred in the city, and the first Christians began to arrive, Rome became Christian, and the Old St. Peter's Basilica was constructed in 313 AD. Despite some interruptions (such as the Avignon papacy), Rome has for centuries been the home of the Roman Catholic Church and the Bishop of Rome, otherwise known as the Pope.