Colosseum, also called Flavian Amphitheatre, giant amphitheatre built in Rome under the Flavian emperors. Construction of the Colosseum was begun sometime between 70 and 72 CE during the reign of Vespasian. It is located just east of the Palatine Hill, on the grounds of what was Nero’s Golden House.
The structure was officially dedicated in 80 CE by Titus in a ceremony that included 100 days of games. Later, in 82 CE, Domitian completed the work by adding the uppermost story. Unlike earlier amphitheatres, which were nearly all dug into convenient hillsides for extra support, the Colosseum is a freestanding structure of stone and concrete, using a complex system of barrel vaults and groin vaults and measuring 620 by 513 feet (189 by 156 metres) overall. Three of the arena’s stories are encircled by arcades framed on the exterior by engaged columns in the Doric, Ionic, and Corinthian orders; the structure’s rising arrangement of columns became the basis of the Renaissance codification known as the assemblage of orders. The main structural framework and facade are travertine, the secondary walls are volcanic tufa, and the inner bowl and the arcade vaults are concrete.
In medieval times, the Colosseum was used as a church, then as a fortress by two prominent Roman families, the Frangipane and the Annibaldi. The Colosseum was damaged by lightning and earthquakes and, even more severely, by vandalism and pollution. All the marble seats and decorative materials disappeared, as the site was treated as little more than a quarry for more than 1,000 years. Preservation of the Colosseum began in earnest in the 19th century, with notable efforts led by Pius VIII, and a restoration project was undertaken in the 1990s. It has long been one of Rome’s major tourist attractions, receiving close to seven million visitors annually. Changing exhibitions relating to the culture of ancient Rome are regularly mounted.
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