Château Pèlerin, also known as Atlit, is a Crusader fortress and fortified town located about 2 kilometres north of the modern Israeli town of Atlit on the northern coast of Israel.
The Knights Templar began building the fortress in 1218 during the Fifth Crusade. One of the major Crusader fortresses, it could support up to 4,000 troops in siege conditions. It became for a short time the headquarters of the Crusaders. In early August 1291, three months after the Siege of Acre, the forces of Al-Ashraf Khalil conquered Atlit, which was at that point the last remaining Crusader outpost in Syria, thus permanently ending Crusader presence in the region.
The fortress remained intact for several hundred years, until suffering damage in the Galilee earthquake of 1837. In the 14th century, it became home to a large concentration of Oirat Mongols. During early Ottoman rule, in the 16th century, it was recorded in tax registers as a port of call and a farm. Later, in the 19th century, it was a small fishing village under the influence of the local al-Madi family.
It was depopulated of its Palestinian inhabitants in 1948. In modern times, the castle is part of the Atlit naval base, a training zone for Israeli Naval commandos.
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.