Krumau Castle sits beautifully on a rock near the centre of the village next to the river Kamp. Krumau Castle was first mentioned in 1172. The castle became the summer residence for Queen Margarethe of Austria after she was banished by her husband King Pfzemysl Ottokar II of Bohemia in 1261.
Later the castle was damaged during sieges, most notably in 1619. After which it was rebuilt in 1667/1668. From the 18th century on however, the castle fell to ruin. From 1959 on the castle was partially rebuilt.
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.