15th century castle in Sarmiento belonged to the important Sarmiento family. Its last owner was the House of Alba. Acquired by the Provincial Council of Palencia, we can visit the tower, its rooms and its ramparts. It hosts an exhibition entitled PlastiHistoria, showing various scenes made in clay on the history of Palencia. Its keep has a height of 22 meters and the thickness of its walls is the largest of the Spanish castles, reaching 11 meters thick in some places
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.