Popularly called the Arena of Pula, it was bulit in the 1st century AD during the reign of Emperor Vespasian and it became the ancient monument in the center of Pula. 3000 years ago it hosted the popular gladiator fights which took place in the central flat area called the arena, but today many summer performances take place in the same place where gladiator had fought in the Roman time. It is the 6th largest ancient amphitheater in the world.