The castle of Villar Dora is a medieval feudal residence, among the best preserved of the Susa valley. It was built in the 13th century to the rocky hill which has been occupied since Roman times. The castle was renovated in Gothic style in the 14th century by Provana family. In the early 20th century, Count Antonielli d'Oulx carried out restoration works that returned the original medieval aspect to the central body of the castle.
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.