Until recently very little was known about the building history of Huis Hatert. The tower was probably built in the second half of the 14th century. The west and south sides of the building show signs of walls that were once attached to the tower, which makes it likely that the tower used to form a part of a greater complex and that it served as a gate tower located on one of the corners of a lager castle. Its relatively thin walls and small size also hint at this. In later times the tower underwent great changes. Floor heights were changed, openings were blocked and new wings were attached to the tower aft er the former walls had been torn down. It is evident that one of the cellars of Huis Hatert dates back to the 16th century and one of the wings to the 18th century. In the 19th century a new gable was placed in front of the 18th century wing and tower to create a more uniform appearance.
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.