Pürksi estate was founded in 1620. The building is from 1852. It was the home of artist Johann Carl Emanuel von Ungern-Sternberg(1773-1830), some of whose works are currently at the Art Museum of Estonia, Tallinn. The manor, which lies in a part of Estonia that formerly had a sizeable Swedish minority, is today occupied by a school that is specialised in teaching Swedish.
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.