This is a statue base. The inscription is a dedication to Caracalla in the Vigiles Barracks

I think this is Mithras slaying a bull. The floor shows 4 stages of him killing the bull.

Two stages on the other side of the floor.

This is a covered fountain where people would get their water. It was covered so stuff wouldn't fall in to it.

The ruins of an Insulae. An apartment building.

The theater.

Up to 4,000 people could fit in to the theater.

These faces on columns were by the stage part of the theater.