The Colosseo, also known as the Colosseum, is an ancient amphitheater located in the heart of Rome, Italy. 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 Colosseo is made of concrete and stone, showcasing the advanced construction techniques of the Roman Empire. Today, it is a UNESCO World Heritage Site and one of the most popular tourist attractions in the world, drawing millions of visitors each year who come to admire its historical significance and grandeur.