The columns of the Temple of Antoninus and Fau…

The columns of the Temple of Antoninus and Faustina, seen on the right beyond the ruins. They survived because they were incorporated into a church. Otherwise ancient buildings were dismantled, and the bricks, marble and decorative cladding used in later construction. I heard that a lot of what’s gone from the Colosseum was used in the building of St. Peter’s in The Vatican.