The Barxell Castle, located in the municipality of Alcoy, is a 13th-century medieval building which stands on a rocky mound in the middle of a pine forest. It is next to the CV-795 road, between Alcoy and Banyeres de Mariola. It is located in the rural place of Barxell at 800 metres altitude.
The fortress was built as a refuge for the inhabitants of the farmhouses during the Castilian-Aragonese war. In addition, in the city remains of the wall of the thirteenth and fourteenth centuries are preserved.
The Barxell Castle is located in the rural place of Barxell, in the Valley of Polop, a natural enclave of great scenic value between two natural parks, the Font Roja and Serra Mariola.
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.