Medinaceli Castle was built in the 9th century and rebuilt in the 15th century. There aren’t many remains left of this castle which was of great importance during the Middle Ages. According to legends, inside the castle, which is now completely restored, there was an Arabic citadel where Al-Mansur was buried after being defeated and killed in the Battle of Calatañazor in 1002, although, there aren’t any remains of this citadel.
The strategic situation of Medinaceli, in the middle of the Jalón River valley, the natural passageway between Aragon and the Castilian Plateau, turned it into a key battleground between Muslims and Christians. Legend has it that Al-Mansur, the “Invincible” died here and was buried “in the depths of hell”. El Cid took over the city, which was under Muslim domain, and was lucky enough that there was an exceptional chronicler that immortalised him in art form. According to Menéndez Vidal, one of the minstrels of Cantar del Mío Cid was from Medinaceli or from this region.
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.