Lanzada Castle dates from the c. 960 AD and it was built to the grounds of Phoenician or Roman lighthouse. The castle was built to protect the area against Viking and Norman raids and later for Moorish pirates. It was conquered by Irmandiño revolts and destroyed in 1467. Today one hermit and and part of the keep remains.
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.