The famous ancient amphitheater in Rome is the Colosseum. Constructed between AD 70 and 80, it is one of the most recognizable symbols of Ancient Rome and an enduring testament to Roman architecture and engineering. The Colosseum was primarily used for gladiatorial contests, public spectacles, and other entertainment events. It could hold an estimated 50,000 to 80,000 spectators and features intricate systems of vaults and arches. Today, it is a UNESCO World Heritage Site and one of the most visited tourist attractions in the world.