Besieged in 778 by Charlemagne, Château Fort de Lourdes became the residence of the Counts of Bigorre in the 11th and 12th centuries. In the 13th century, it passed into the possession of the Counts of Champagne, part of the kingdom of Navarre before coming under the crown of France under Philippe le Bel. It was ceded to the English by the Treaty of Brétigny in 1360, before returning to France at the start of the 15th century after two sieges. In the 17th century, the castle became a royal prison, and a state prison after the French Revolution, continuing in this role until the start of the 20th century when it became the Pyrenean Museum (1921) which it remains.
The castle's origins go back to Roman times. Various remains from this era (fragments of sculpture, votive offerings, wall foundations) were brought to light by military engineering work in the 19th century. However, a consequence of these works was the destruction of the greater part of the ancient walls. The finds are exhibited on the site.
Today, the oldest remains date from the 11th and 12th centuries and consist of the foundations of the present fortifications. The castle was reinforced in the 13th and 14th centuries (construction of the keep), and again in the 17th and 18th centuries.
The Notre-Dame-du-Château chapel houses the furniture of the former parish church of Saint-Pierre de Lourdes, destroyed in 1904. The present chapel is constructed with recycled material from Saint-Pierre de Lourdes.
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.