Falkenstein castle was originally built by the Bishop Tuto of Regensburg before 1074. The medieval stone castle was built in the early 13th century. It was expanded and rebuilt several times before the castle was burned down by the Swedes in 1634 (during Thirty Years' War). The decayed Falkenstein castle was restored in the 20th century. Today the castle is a museum, festival venue and restaurant.
The Château Comtal (Count’s Castle) is a medieval castle within the Cité of Carcassonne, the largest city in Europe with its city walls still intact. The Château Comtal has a strong claim to be called a 'Cathar Castle'. When the Catholic Crusader army arrived in 1209 they first attacked Raymond-Roger Trencavel's castrum at Bèziers and then moved on to his main stronghold at Carcassonne.
The castle with rectangular shape is separated from the city by a deep ditch and defended by two barbicans. There are six towers curtain walls.
The castle was restored in 1853 by the architect Eugène Viollet-le-Duc. It was added to the UNESCO list of World Heritage Sites in 1997.