The city known for the Colosseum is Rome, Italy. The Colosseum, an iconic symbol of ancient Rome, is an amphitheater that was used for gladiatorial contests and public spectacles. Constructed between 70-80 AD, it could hold tens of thousands of spectators and features innovative architectural designs for its time, including arches and vaults. Today, it stands as a UNESCO World Heritage site and a major tourist attraction, reflecting the grandeur of the Roman Empire and its cultural significance. The Colosseum is not just a historical monument; it also represents the art of engineering and the social life of ancient Romans.