Roman theatre (structure)
Roman theaters derive from and are part of the overall evolution of earlier Greek theaters. Indeed, much of the architectural influence on the Romans came from the Greeks, and theatre structural design was no different from other buildings. However, Roman theatres have specific differences, such as being built upon their own foundations instead of earthen works or a hillside and being completely enclosed on all sides.
Buildings
Roman theatres were built in all areas of the empire from Spain to the Middle East. Because of the Romans' ability to influence local architecture, we see numerous theatres around the world with uniquely Roman attributes.
There exist similarities between the theatres and amphitheatres of ancient Rome/Italy. They were constructed out of the same material, Roman concrete, and provided a place for the public to go and see numerous events throughout the Empire. However, they are two entirely different structures, with specific layouts that lend to the different events they held. Amphitheatres did not need superior acoustics, unlike those provided by the structure of a Roman theatre. While amphitheatres would feature races and gladiatorial events, theatres hosted events such as plays, pantomimes, choral events, and orations. Their design, with its semicircular form, enhances the natural acoustics, unlike Roman amphitheatres constructed in the round.