The 14th-century Vozmediano Castle is located atop great hills on the border with Aragon. Throughout the structure you can see various construction styles from different periods; Roman surrounding walls, a Muslim watchtower and medieval walls with battlement hexes.
The castle is currently in ruins although it was made up of a double walled enclosure, the outer walls being strengthened on the most vulnerable corner by a great quadrangular tower where there was an access gate, and on the other corner, a circular tower that was built later on. Another quadrangular tower placed in the middle of the wall was used as an abutment, and the rest of the perimeter does not contain any more towers and is actually much thinner than the other walls. The inner enclosure still maintains the original keep and is currently being used as the village’s cemetery. “Marqués de Santillana” dedicates some verses to this area where the Queiles River’s source is located in the foothills of Mount Moncayo.
References: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.