Located at 89 meters in height, the Pedres castle was built between 1296 and 1322 during the Pisan-Aragonese domination period during the ascent of the Visconti family. It is characterized by two squares, one upper and one lower, surrounded by polygonal walls, reachable through stairs built with large granite boulders. Its position allowed to control the territory up to the Gulf of Olbia.
In 1339 the castle was entrusted to the hospital friars of Saint John of Jerusalem. From the second half of the fourteenth century it was occupied by the Aragonese and then by the Giudicato of Arborea. The castle met a definitive abandonment at the beginning of the fifteenth century, coinciding with the decline and depopulation of Civita.
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.