St. Peter's Basilica
Roman Catholic basilica and landmark in Vatican City
Properly the Papal Basilica of Saint Peter in the Vatican, an Italian Renaissance church in Vatican City, an independent microstate surrounded by Rome, Italy. In the 15th century Pope Nicholas V, and after him Pope Julius II, planned it as the replacement for Old St. Peter's Basilica, which the Roman emperor Constantine the Great had built in the fourth century and which was growing old.
Photo: Alvesgaspar, CC BY-SA 4.0