The smaller Roman Theatre of Pula from the 1st century AD was erected on the slope underneath the Venetian fortress. The area was divided into the stage and the proscene where the acting took place, the orchestra and the viewing area or the cavea. The theatre lied on the hill slope, which was the characteristic of Greek theatres. Only the stage foundations and a part of the semi-circular viewing area of the Small Roman Theatre have remained preserved. During the Antiquity, the theatre occupied a larger space not visible today in view of never completed archaeological surveys. Its capacity was estimated between 4 and 5 thousand spectators, which was the entire population of Pula at the time. Today, as in the Roman times, the twin gates lead to the theatre. In front of it is the Archaeological Museum, once the site of the German high school.
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.