Located at the western end of the Monleón village, next to a steep area that dominates the confluence of the Carnicero stream with the Alagón river, Monleón Castle was raised in the 13th century as part of the defensive walls that surround the village.
Its groundplan is an irregular trapeze, with the keep in the middle. The north and east wall of the enclosure are built later than the others, to obtain a fortified perimeter that defended the tower from inside the village. The square keep is made up of large granite blocks reinforced with ashlar masonry at its corners. The top is fitted with 8 turrets. In medieval times the keep could be accessed on the second floorlevel by means of a removable stair or drawbridge. Its interior was fitted with five floors.
In 1477 the castle was besieged by the troops of King Fernando the Catholic. The reason for this was that its lord; a Salamancan knight, Don Bernardo Maldonado the Tyrant, had been manufacturing false currency amongst other crimes that caused great damage to the surrounding territories.
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.