That's how it usually goes, either the outer circuit of the circus and amphitheaters are used as support walls for housing, the entire thing is turned into a ramshackle fortress for a feudal petty noble or the flat space is used for farming by local peasantry who don't need to clear any rubble.
That's how it usually goes, either the outer circuit of the circus and amphitheaters are used as support walls for housing, the entire thing is turned into a ramshackle fortress for a feudal petty noble or the flat space is used for farming by local peasantry who don't need to clear any rubble.
Here's a visual reconstruction for comparison of the city during Roman times by archaeologist Jean Claude Golvin
Also, for an interesting historical sweep of where things turned out, here's a pictoral map made of the city in 1953, still largely bombed out following WWII.