Monreale (Königsberg in German) castle in Faedo was built by the Appiano family around 1200. During the centuries, the castle was acquired by the Counts of Tyrol , then by the Habsburgs , in the 17th century by Rubin de Cervin Albrizzi and in the 20th century by entrepreneur Karl Schmid. Today it is privately owned.
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.