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.
It continued in this role until the start of the 20th century, when it became the Pyrenean Museum (Musée Pyrénéen) (1921) which it remains The castle's origins go back to Roman times.
Today, the oldest remains date from the 11th and 12th centuries and consist of the foundations of the present fortifications.
[4] The Notre-Dame-du-Château chapel houses the furniture of the former parish church of Saint-Pierre de Lourdes, destroyed in 1904.