The Roman Theatre of Orange was built early in the 1st century AD. It is one of the best preserved of all Roman theatres, and served the Roman colony of Arausio which was founded in 40 BC. Playing a major role in the life of the citizens, who spent a large part of their free time there, the theatre was seen by the Roman authorities not only as a means of spreading Roman culture to the colonies, but also as a way of distracting them from all political activities.
Mime, pantomime, poetry readings and the attelana (a kind of farce rather like the commedia dell'arte) were the dominant forms of entertainment, much of which lasted all day. For the common people, who were fond of spectacular effects, magnificent stage sets became very important, as was the use of stage machinery. The entertainment offered was open to all and free of charge.
It has been restored to its former function, primarily for opera, alongside its use as a tourist spot. In 1981, the Roman Theatre was inscribed on the UNESCO World Heritage List for its outstanding preservation and architecture.
References:The ancient Argos Theater was built in 320 BC. and is located in Argos, Greece against Larissa Hill. Nearby from this site is Agora, Roman Odeon, and the Baths of Argos. The theater is one of the largest architectural developments in Greece and was renovated in ca 120 AD.
The Hellenistic theater at Argos is cut into the hillside of the Larisa, with 90 steps up a steep incline, forming a narrow rectilinear cavea. Among the largest theaters in Greece, it held about 20,000 spectators and is divided by two landings into three horizontal sections. Staircases further divide the cavea into four cunei, corresponding to the tribes of Argos A high wall was erected to prevent unauthorized access into the theatron and may have helped the acoustics, but it is said the sound quality is still very good today.
Around 120 CE, both theaters were renovated in the Roman style.