Castillo de Gigonza site has been in existence since antiquity. The present castle is of Andalusian origin and almost square in shape, with two parts to its structure. The current appearance dates from the 13th and 14th centuries. A narrow and low door contains a lintel with two heavy imposts. The upper floor is vaulted and contains windows. The grounds contain a surrounding fence. The courtyard is accessed through a door with and arch, displaying a coat of arms of the Casa de Arcos.
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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.