The city known for its iconic Coliseum is Rome, Italy. The Colosseum, a large amphitheater built in the first century AD, stands as one of the most recognizable landmarks in the world and an enduring symbol of ancient Roman architecture and engineering. Capable of seating tens of thousands of spectators, it was primarily used for gladiatorial contests and public spectacles, including animal hunts and mock sea battles. Today, the Colosseum attracts millions of tourists each year, serving as a UNESCO World Heritage site and a testament to Rome's rich historical and cultural heritage.