The Teatro romano de Sagunto is a Roman theatre located in Sagunto, Spain. It is located at the foot of the mountain, crowned by Sagunto Castle. It occupies the intermediate terrace, between the city and the upper platform chaired by the Forum, Civic Center of the municipality, responding to an urban planning of the times of Emperor Augustus.
The theatre was built in the middle of the first century, using the slope of the mountain. It consists of two distinct parts: the cavea or grandstands, semicircular and composed by three orders of stands and the frons scaenae, which rises to the height of the top of the grandstands porch. It is semicircular in shape and can seat 8,000 spectators.
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.