An Amphitheatre was a structure built throughout the Roman empirewhere ordinary people could watch such spectacles as gladiator games, mock naval battles, wild animal hunts, and public executions. Usually oval in form, the largest examples could seat tens of thousands of people, and they became a focal point of Roman society and the lucrative entertainment business. Amphitheatres are one of the best surviving examples of ancient Roman architecture, and many are still in use today, hosting events ranging from gladiator re-enactments to opera concerts.
About 230 Roman amphitheatres have been found across the area of the Roman Empire. Their typical shape, functions and name distinguish them from Roman theatres, which are more or less semicircular in shape; from the circuses (similar to hippodromes) whose much longer circuits were designed mainly for horse or chariot racing events; and from the smaller stadia, which were primarily designed for athletics and footraces.
An amphitheatre or amphitheater is an open-air venue used for entertainment, performances, and sports. The term derives from the ancient Greek ἀμφιθέατρον, from ἀμφί, meaning "on both..