羅馬圓形競技場, also known as the 羅馬競技場 or Colosseum, is an ancient amphitheater located in the heart of 羅馬, 意大利. Built between 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 is an iconic symbol of Roman engineering and architecture. The Colosseum is made of concrete and stone, showcasing the advanced construction techniques of the time. It features a complex system of vaults and arches, which contributed to its durability. Today, it stands as a UNESCO World Heritage Site and a major tourist attraction, drawing millions of visitors each year.