Monschau Castle is first recorded in 1217 as castrum in Munjoje by Archbishop Engelbert I of Cologne. It was expanded in the middle of the 14th century into a fortress for the counts of Jülich and equipped with mighty ring walls and wall walks. In 1543 troops of Emperor Charles V besieged the site with heavy guns, captured it and plundered it together with the town of Monschau.
In the early 19th century the French administration declared the castle to be state property and sold it to a private buyer who had the roofs removed in 1836 and 1837 in order to avoid building tax. As a result, the castle fell into ruins until, in the early 20th century, the government of the Rhine province secured and repaired it. After the First World War a youth hostel was opened in the west wing. So Monschau Castle survived as a 'youth castle' (Jugendburg).
Within sight of the castle, on the other side of town, is another fortification, the Haller. It is disputed as to whether it was an outpost of the castle, a detached watchtower or the remains of an older castle site.
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.