The western tower of Wartensee castle was built in 1243 by Ritter Heinrich von Wartensee as a residential tower. By the marriage the tower went in 1377 to the brothers Walter and Diethelm Blarer from St. Gallen. The family Blarer owned Wartensee until 1719. The current appearance dates from the alterations made in 1843-1553 by English composer Robert Lucas Pearsall de Willsbridge. Today Wartensee is a hotel.
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.