Ancient Roman amphitheatres were major public venues, circular or oval in plan, with perimeter seating tiers. They were used for events such as
venationes (animal hunts) and executions. 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.
The earliest Roman amphitheatres date from the middle of the 1st century BC, but most were built under Imperial rule, from the
Augustan period (27 BC–14 AD) onwards.
 Imperial amphitheatres were built throughout the Roman empire; the largest could accommodate 40,000–60,000 spectators. The most elaborate featured multi-storeyed, arcaded façades and were elaborately decorated with
stucco and statuary.
 After the end of gladiatorial games in the 5th century and of staged animal hunts in the 6th, most amphitheatres fell into disrepair. Their materials were mined or recycled. Some were razed, and others were converted into fortifications. A few continued as convenient open meeting places; in some of these, churches were sited.