The famous ancient structure found in Rome is the Colosseum, also known as the Flavian Amphitheatre. Construction began under Emperor Vespasian in AD 70-72, and it was completed in AD 80 under his successor, Emperor Titus. The Colosseum was used for gladiatorial contests, public spectacles, and other events, accommodating tens of thousands of spectators. Its architectural grandeur, with a complex system of vaults and arches, represents a remarkable achievement in engineering. Today, it stands as an iconic symbol of ancient Rome and a UNESCO World Heritage site, drawing millions of visitors annually who marvel at its historical significance.