Château d'Ailly was first mentioned in 1050 when Robert d'Ailly built a manor surrounded with walls, moat and mill. The near St. Gerbold's Church was also built then. In 1431 english King Henry VI gave the land property of Ailly to his uncle. Back in French possession, the manor belonged to the Courseulles and De Saint Laurens families until it was acquired by d'Aubert de Caudémone in the 17th century. Charles d'aubert d'Ailly, a Knight of Malta, transformed the château in 1721 to the current appearance.
The archaeological project in 1832 unearthed the nine famous d'Ailly helmets, which were well-preserved helmets dated back to the end of Bronze Age.
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.