The origins of the present Chelva town can be found in the 11th century, when the ruling Moors established a fortress. The original city center was developed adjacent to the castle. It was enclosed by a wall with four gates (one is still visible, San Cristobal). Because of these fortifications, Chelva was a town of considerable importance during the Muslim rule.
The castle was converted as a palace where the Viscount of Chelva stayed from the late 14th century. The building evolved architecturally, eventually presiding over the Main Plaza. An Iberian occupation from the 4th century B.C. has recently been discovered, and the location of Chelva’s first Christian church within the castle walls from the 13th century has been confirmed.
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.