Italy, Latium, Rome, Basilica of St. Paul outside the Walls. Detail. View of the external side of the basilica focusing on the upper part of the façade, decorated with mosaic, which is visible through the palms. The four prophets of the Old Testament are visible in the lower layer, while in the tympanum is depicted a Blessing Jesus Christ between St. Paul and st. Peter. The upper part of the columns can also be seen.