Rome has been a film subject since the beginning of cinema, and the relationship between Hollywood’s Rome and the historical record is complicated in ways that go beyond simple error-counting. Some of what cinema gets wrong is deliberate simplification for narrative clarity. Some is period convention — the sandal epics of the 1950s reflected Cold War anxieties as much as ancient history. Some is genuine incomprehension of a world sufficiently distant that even educated filmmakers cannot feel its difference. And occasionally, something unexpected gets it exactly right in ways that the filmmakers may not have consciously intended.

Popular history is a machine for producing confident errors, and Rome is one of its most productive subjects. The combination of genuine drama, distant evidence, and centuries of embellishment has generated a set of myths about Rome that persist through repetition long after the historical record has corrected them. Some are harmless. Some distort the actual history in ways that matter.

The vomitorium was not a room for vomiting. It was a technical term for the exit passages of an amphitheater or theater — the tunnels through which large crowds could rapidly exit a stadium after an event. The word derives from the Latin vomere, meaning to spew out, which is an entirely accurate description of crowds disgorging from a building. The association with Roman dining excess came later and has no serious ancient support. Romans did occasionally induce vomiting for medical or digestive reasons, but the image of systematic purging between banquet courses is a fantasy.