The first reference to a castle in the village of Penne dates from 825 AD and its first known señor was Geoffroi, mentioned in 1096 in documents related to Raymond, Count of Toulouse. Throughout the Middle Ages (5th to 15th centuries) the site of Penne was of military strategic importance, being situated on the borders of the provinces of Albigeois, Quercy and Rouergue, with its fortress perched atop a cliff overlooking the River Aveyron.
The castle remained in use, seeing repeated conflicts, such as the Hundred Years War(1337-1453) between England and France, and the French Wars of Religion (1562–1598) between Protestants and Roman Catholics during which it was partly destroyed. It was then abandoned for approximately 400 years.
The remains of the castle include the dungeon, the ramparts and a chapel.
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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.