Museum Het Prinsenhof, 'the Princes' Court', is located in the former Sint Agathaklooster monastery. In 1572, William of Orange chose the monastery as one of his houses. From this building, the Prince led the uprising against the Spanish rule over the Netherlands. On the 10th of July 1584 he was murdered on the stairs of Het Prinsenhof by the Spanish sympathiser Balthazar Gerards. The wall of the stairs shows two bullet holes that bear witness to this event.
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.