What to see at the Vatican? St Peter‘s, the Obelisk, the Colonnade, the Dome, the Museums, the Gardens and more besides. You’d need to come to Rome just to visit this small state in the heart of Rome, the seat of the Papacy and cradle of Christianity, with its rich heritage and works of art from all eras. Every visit must begin from the most famous square in the Vatican, St Peter’s. The Colonnade’s embrace, the Basilica’s welcome and the Dome’s grandeur give the warmest of welcomes to pilgrims.