Kandava settlement was first mentioned in 1230 in a peace treaty between the residents of Riga and the residents of the Abava valley in Courland. A military castle was built around 1257, but it was gradually dismantled over the years and now only its foundations can be seen in a town park. The oldest remaining structure is a guard tower built in 1334 and later used for gunpowder storage.
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.