The Colosseum, also known as the Flavian Amphitheatre, is one of Rome's most iconic monuments and an outstanding example of Roman architecture. Built between 70 and 80 AD under the emperors Vespasian and Titus, the Colosseum is an elliptical amphitheatre measuring approximately 189 metres long, 156 metres wide and 50 metres high. Its structure is mainly made of travertine, a type of limestone, and has three orders of superimposed arches, each decorated with columns of different styles: Doric, Ionic and Corinthian.
The interior of the Colosseum could accommodate up to 50,000 spectators, who watched gladiator fights, hunting shows and other forms of entertainment. The layout of the amphitheatre is characterised by a system of corridors and staircases that allowed quick access to the various sectors. Under the floor of the arena was the 'hypogeum', a complex of tunnels and rooms used for the preparation of shows and the housing of animals. The Colosseum is a symbol of the greatness of the Roman Empire and continues to be an important tourist attraction.