A stone house on the site of current Mheer Castle was first mentioned in 1314. It was probably built long before that, because the Lords of Mheer were already mentioned around 1100. In the 14th century the castle went to the Van Imstenraedt family through marriage. The castle stayed in this family until 1668, then it went to the De Loë family. They still own the castle.
The castle is situated against the slope of a hill and thus has a dry moat. From the original 14th century castle only wall fragments remain. This original castle probably consisted of three wings surrounding a courtyard with the fourth side closed by a curtain wall. The present bailey dates back to the 16th and 17th century.
The present castle was rebuilt, with the use of original wall fragments, on the medieval foundations in the 17th century. Also in later centuries, up until the 20th century, a lot of rebuilding took place.
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.