The Teatro di Pompey, where Caesar was murdered on the Ides of March in 44 BC, shortly after naming himself Dictator for Life. Well, he was right anyway.

Although no remains of the theater can be seen above ground today, the University of Washington Rome Center now stands on this spot.

built c. 55 BC

The Teatro di Pompey, ironically, was named for a rival defeated by Caesar on the battlefield, and it is reputedly at the foot of Pompey's statue that Caesar died.