The Basilica of Saint Petrus, commonly called Saint Peter's Basilica, is one of four major basilicas of Rome. It is the most prominent building inside the Vatican City and its dome is a dominant feature of the Roman skyline. Saint Peter's is also incidentally the patriarchal basilica of Constantinople whereas the Lateran Basilica is the patriarchal basilica of Rome. Possibly the largest church building in Christianity, it is one of the holiest sites of Christendom in the Catholic tradition, being traditionally the burial site of its namesake Saint Peter.
