Simiane-la-Rotonde has remained practically unchanged for centuries. On the hilltop stands the truncated cone-shaped edifice that gave Simiane-la-Rotonde its name: the keep, or rotunda, of the old Château des Simiane-Agoult. Built in the 12th century, its massive exterior is remarkable for its hexagonal shape. The interior, an uneven dodecagon, is especially splendid. It is a vast room with a series of arches topped by finely sculpted capitals. The ceiling has a stone cupola of 12 ribbed vaults towering five metres high. It is an amazing example of Romanesque architecture, both civil and military.
The southern wing of the castle has also been restored and you can visit parts of the main building and the fortifications. The rooms on the ground floor date from the Middle Ages and recount the castle's history. The upper floor, in Renaissance style, houses the Sainte Victoire Aromatherapy Laboratory, which offers workshops in essential oils to the public.The castle is also the magical setting for exhibitions and the international festival of early music Les Riches Heures Musicales de la Rotonde in August.
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.