The Château de Gien was built in the 15th century for Anne of France. Guests included King Francis I of France, King Henry II of France, Queen consort Catherine de' Medici, King Charles IX of France, Queen consort Anne of Austria and King Louis XIV of France.
It has belonged to the French government since 1823. During World War II, it was bombed in 1940 and later restored. It is home to a museum about hunting.
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.