St. Peter's (Italian San Pietro) is a major basilica in Vatican City, an enclave of Rome.
Until recently, St. Peter's was the largest church ever built (it covers an area of 23,000
square meters with a capacity of over 60,000 people), and it remains one of the holiest
sites in Christendom in the Catholic tradition. It is the most prominent building inside
the Vatican City, and its dome is also a dominant feature of the Roman skyline.