Carbisdale Castle was built in 1905-1917 for the Duchess of Sutherland on a hill across the Kyle of Sutherland. The castle has 365 windows, and the clock-tower only has clocks on three sides: the side facing Sutherland does not have a clock. There is a secret door below the Great Staircase which could be opened by rotating one of the statues. This mechanism is no longer in use. Until its closure, the castle had a large collection of art, with some pieces dating back to the year 1680, as well as the Italian marble statues.
Colonel Theodore Salvesen, a wealthy Scottish businessman of Norwegian extraction, bought the castle in 1933. He provided the castle as a safe refuge for King Haakon VII of Norway and Crown Prince Olav, who would later become King Olav V, during the Nazi occupation of Norway in World War II. During that time the castle was also used to hold important meetings. King Haakon VII made an agreement at the Carbisdale Conference on 22 June 1941, that the Russian forces, should they enter Norwegian territory, would not stay there after the war. Three years later, on 25 October 1944, the Red Army entered Norway and captured thirty towns, but later withdrew according to the terms of the agreement. After the Colonel died his son, Captain Harold Salvesen, inherited the castle and gave its contents and estate to the Scottish Youth Hostels Association. Carbisdale Castle Youth Hostel opened to members on 2 June 1945.
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.