Lielstraupe Castle was built at the end of the 13th century by Fabian von Rosen, vassal of the Riga Archbishop. The village of Straupe began to develop around the castle in the 14th century. A large tower was added around 1600. Severely damaged by fire in 1905, the castle was restored between 1906 and 1909 by architect Vilhelms Bokslafs. Since 1963 it has housed a drug addiction rehabilitation hospital.
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.