Châtelard castle was built probably by Rudolph Grossi, bishop of Aosta in 1243 and archbishop of Tarantasia in 1246. It is first mentioned in a document from 1248, and presents the type of circular tower reminiscent of the fortified constructions of Count Peter II of Savoy, to whom Grossi was a close advisor. All around, medieval dwellings of all shapes and sizes dot the land like small sentries with an ancient charm: the Pascal fortified house, the Aragon fortified Manor house, Maison Gerbollier, just above, the home of the Ecours and again, in the village of Derby, the notarial castle.
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.