The Roman Colosseum, located in Rome, Italy, is an ancient amphitheater built around 70-80 AD. It was used for various public spectacles, including gladiatorial contests, animal hunts, and mock sea battles. The structure could hold up to 80,000 spectators and features a complex system of vaults and arches. The Colosseum is an iconic symbol of Roman architecture and engineering. It measures about 189 meters long and 156 meters wide, with a height of 48 meters. Today, it is a popular tourist attraction and a UNESCO World Heritage Site, reflecting the grandeur of the Roman Empire.