The Château de Montoire is a ruined castle in Montoire-sur-le-Loir. The construction began in the 11th century and there were further building works in the 12th, 13th and 14th centuries.
During the Wars of Religion Montoire castle was conquered by the Catholic League. That was the reason why protestant King Henry IV ordered to demolish it in 1593. Today it remains ruined.
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.