Château de Montségur

The Château de Montségur (English: Castle of Montsegur; Languedocien: Castèl de Montsegur) is a former fortress near Montségur, a commune in the Ariège department in southern France. Its ruins are the site of a razed stronghold of the Cathars. The present fortress on the site, though described as one of the "Cathar castles," is actually of a later period. It has been listed as a monument historique by the French Ministry of Culture since 1862. In July 2026, the Royal Capetian Fortresses of Languedoc (including this fortress) were designated by UNESCO as a World Heritage Site.

Source: Wikipedia (CC BY-SA 4.0) — https://en.wikipedia.org/wiki/Ch%C3%A2teau_de_Monts%C3%A9gur