Kommende Ramersdorf was established in 1230 as one of the over 300 commanderies of the Teutonic Knights following the crusades. The Georgian chapel , which had been preserved, was built between 1220 and 1230. In the 13th and 14th centuries the commanders of the Ramersdorf were mostly Rhenish nobles, ministerial and urban patricians. After a fire in 1842, the entire complex was rebuilt in Neo-Gothic style. Today Ramensdorf is a hotel.
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.