Castillejo de Robledo castle and its lands were property of the Order of Malta until it was suppressed by Pope Clement V in 1311. After that the estate passed to the Knights Hospitaller and then to the residents of the town. In the town there was an old Moorish fortification where the current castle was built in the 12th century. The remains of the original wall are visible and are characterized by a greater thickness than the walls erected later.
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.