There is an interesting difference between the Tourist Board emphasis of the castles of the region being Cathar Castles, and the leaflets and books at the castle gates saying that the castles merely sheltered some heretics for a few years. The emphasis here being these were castles loyal to the French king and any nasty heretics were quickly dealt with by the hero, Simon de Montfort. 
No mention is made of the wholesale massacres and burnings. The church point of view reigns supreme. Info-leaflets issued at the gate give no details of what happened. One must be willing to spend half an hour delving into the weighty tomes in the bookshop to discover the beliefs and fate of the Cathars.

Fantastic castle unbelievably remote and high, bedded into solid rock.
The road there went over passes 3600 ft high with snow poles beside them for winter. Scarily narrow for a right-hand drive bunny and a cool river waiting below in the Quillan to Axat gorge. Thunder rumbled while I walked round. Great views of the Pyrenees.

As you drive up into a medieval village, it pays to have a Fiat 500!

If you want it, you can have it for a mere 20 million Euro.
The Windows give the age away. It's mostly fifteenth century. At the moment it has a set of nettles and brambles worthy of Sleeping Beauty. The 12th century Coeur de Lion bit is below.