The monument suffered serious damage over the time, mostly because of earthquakes.
The north side of the perimeter wall is still standing, but only because of some modern additions in the early 19th century. The present-day exterior of the Colosseum is in fact the original interior wall.
The remaining part of the exterior wall's façade contains three stories of arcades, a podium on which stands a tall attic, decorated in Corinthian style.
The arcades are framed by half-columns of the Doric, Ionic, and Corinthian styles. The arches in the second- and third-floor are also framed with statues, probably in honor of some from Classical mythology.