Heers Castle built in the 13th century. Of its many owners, among the most notorious was Raes van Heers (1418–77), who was defeated and driven into exile by Charles the Bold at the Battle of Brustem in 1467. The castle, and the town of Heers, were laid waste by Charles's troops, although the castle was eventually repaired after Raes' death by his widow.
The family de Rivière d'Arschot lived here until the 18th century, when Barbara, daughter and heiress of the last Count, Henri de Rivière d'Arschot, became abbess of Herkenrode Abbey; on her death in 1744, the family became extinct.
References: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.