The Ronde Lutherse Kerk or Koepelkerk is a former Lutheran church designed by Adriaan Dortsman (ca. 1636-1682). It was opened in 1671. The organ was built by J Batz in 1830 and it was restored in 1983 by Flentrop Orgelbouw. In 1882 it was rebuilt after a fire. In 1935 the Lutherans left the building and it became a concert hall.
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.