The Colosseum is a giant Roman amphitheater in the form of an amphitheater and a semicircular stage that located in the center of Rome and is made of concrete, 3.5 million cubic feet of limestone, marble, stone and timber.It was built during the reign of the Roman Emperor Flavio Vespasian. The amphitheater is located directly east of the Palatine Hill.It is composed of four floors. The first floor is supported by Doric columns, followed by a floor supported by Ionic columns, and the third floor is supported by Corinthian columns.
