Dunnideer Castle, now ruined, was a tower house located near Insch, Aberdeenshire. It was built c. 1260 partially from the remains of an existing vitrified hill fort in the same location. It consisted of a single rectangular tower of 15m by 12.5m with walls 1.9m thick. Evidence suggests that a first-floor hall existed. Evidence shows it had several floors.
The tower house is built within an older prehistoric vitrified hillfort dating to c. 250 BC. The prehistoric fort and tower house is a scheduled monument.
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.