The history of Cornatel castle dates back to the 9th century, although it was built on the site of ancient Roman remains. In 1211 Alfonso IX of León donated to the area to Knight Templars who rebuilt the castle. Subsequently it was owned by the Duke of Lemos. The castle is accessed by bordering the western section between the walls and the impressive cliff at the foot of the castle. Inside, exhibitions are held periodically.
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.