The monumental Thun Castle was built in the mid-13th century, but the current appearance dates mainly from the 16th and 17th centuries. The Spanish style gate built in 1566 in Moorish style, probably after Giorgio Thun was visited in Spain. The most famous room is the seventeenth-century Bishop's Room, entirely covered of pine wood, with a coffered ceiling and a tiled stove.
Today Thun castle is open to the public.
The Château de Foix dominates the town of Foix. An important tourist site, it is known as a centre of the Cathars. Built on an older 7th-century fortification, the castle is known from 987. In 1002, it was mentioned in the will of Roger I, Count of Carcassonne, who bequeathed the fortress to his youngest child, Bernard. In effect, the family ruling over the region were installed here which allowed them to control access to the upper Ariège valley and to keep surveillance from this strategic point over the lower land, protected behind impregnable walls.
In 1034, the castle became capital of the County of Foix and played a decisive role in medieval military history. During the two following centuries, the castle was home to Counts with shining personalities who became the soul of the Occitan resistance during the crusade against the Albigensians.