The famous ancient structure in Rome used for gladiatorial contests is 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 a centerpiece of Roman public life, featuring gladiatorial games, animal hunts, and public spectacles. Its architectural design showcased advanced engineering techniques, including the use of arches and vaults. Despite the passage of time and various natural disasters, the Colosseum remains a symbol of Ancient Rome's imperial power and engineering prowess, drawing millions of visitors each year from around the world.