The Colosseum had 80 entrances. Some are visible here below the first-level arches. As you exit from this southern side, make sure to look up. You will notice the surface stone is rough, devoid of ornamentation and pockmarked. After the last event occurred here in 523, the building was plundered for construction materials. The holes were from clamps that once held this inner wall to the exterior wall that is now missing. In the lower left of this photo is the Arch of Constantine, your next stop on the tour.