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 Walls of Constantinople are a series of defensive stone walls that have surrounded and protected the city of Constantinople (today Istanbul) since its founding as the new capital of the Roman Empire by Constantine the Great. With numerous additions and modifications during their history, they were the last great fortification system of antiquity, and one of the most complex and elaborate systems ever built. They were also the largest and strongest fortification in both the ancient and medieval world.
Initially built by Constantine the Great, the walls surrounded the new city on all sides, protecting it against attack from both sea and land. As the city grew, the famous double line of the Theodosian Walls was built in the 5th century. Although the other sections of the walls were less elaborate, they were, when well-manned, almost impregnable for any medieval besieger.