In this picture made available by the Vatican newspaper LOsservatore Romano, Pope Francis, followed by Cardinal Angelo Comastri, right, and Bishop Vittorio Lanzani, partially hidden, visits the necropolis where pagans and early Christians were buried under St. Peters Basilica at the Vatican and where St. Peter is believed to be buried, Monday, April 1, 2013, during what was called the first-ever visit by a pope. The basilica was built over the location where early Christians would gather in secret, at a time of persecution in ancient Rome, to pray at an unmarked tomb believed to be that of Peter, the apostle Jesus chose to lead his church. (AP Photo/LOsservatore Romano)