Montségur is situated in the Ariege, in the foothills of the Pyrenees, on a pog (a volcanic pluton) at an altitude of 1,207 meters.
The ruins that can be seen today are not those of the Cathar fortress, but of a 17th century French defensive castle (although it is said that its stones were taken from the rubble of the previous construction).
It is famous as the last Cathar stronghold, which fell after a 10 month siege in 1244. A field below the hilltop castle is reputed to be the site where over 200 Cathars were burned alive, having refused to renounce their faith.
2017 EUROPA Stamps - Palaces and Castles