Former Cistercian abbey in Lachalade was founded in the early 12th century. The new abbey church was completed in 1340. During the centuries abbey suffered from wars and lootings and it started to decline in the 16th century. Restoration took place in late 17th century during the abbey life reformation, but it was dissolved in 1791 during French Revolution. Today the abbey church is restored
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.