The ancient structure used for gladiatorial contests in Rome was the Colosseum. Also known as the Flavian Amphitheatre, it was commissioned by Emperor Vespasian in AD 70-80 and could hold tens of thousands of spectators. The Colosseum was renowned for its elaborate games, including gladiatorial battles, mock sea battles, and animal fights, serving as both entertainment and a demonstration of Roman engineering prowess. These events showcased Rome's power and cultural significance while also reflecting societal values around honor, bravery, and spectacle. The Colosseum remains an enduring symbol of ancient Rome and is a UNESCO World Heritage site today.