The city known for its historical Colosseum is Rome, Italy. The Colosseum, an iconic symbol of ancient Rome, is an enormous amphitheater built during the Flavian dynasty, completed in AD 80. It served various entertainment purposes, including gladiator contests, public spectacles, and theatrical performances, accommodating tens of thousands of spectators. The architecture and engineering of the Colosseum were groundbreaking for its time, with features like the use of arches and vaults. Today, it stands as a UNESCO World Heritage site and a major tourist attraction, highlighting Rome's rich historical and cultural legacy.