Colosseum: Interior View

The Colosseum (70–80), built under the Flavian emperors, could host over 50,000 spectators for gladiatorial combats and public spectacles. The exposed hypogeum (a two-level subterranean system of tunnels, cages, and lifts) reveals the underground chambers where animals, stage machinery, and performers were prepared, showcasing Rome’s advanced engineering and mass entertainment culture.