High Quality Content by WIKIPEDIA articles! The characteristics of Roman to those of the earlier Greek theatres due in large part to its influence on the Roman triumvir Gnaeus Pompeius Magnus. Much of the architectural influence on the Romans came from the Greeks, and theatre structural design was no different from other buildings. However, Roman theatres have specific differences, such as being built upon their own foundations instead of earthen works or a hillside and being completely enclosed on all sides. Roman theatres derive their basic design from the Theatre of Pompey, the first permanent Roman theatre.