The Papal Basilica of Saint Paul Outside the Walls, Rome

The Papal Basilica of Saint Paul Outside the Walls (Italian: Basilica Papale di San Paolo fuori le Mura), commonly known as Saint Paul's Outside the Walls, is one of Rome's four ancient, papal, major basilicas, along with the basilicas of Saint John in the Lateran, Saint Peter's, and Saint Mary Major. © Wikimedia Commons / Berthold Werner