The Barrage Vauban is a weir (barrier across a river designed to alter its flow) erected in the 17th century on the river Ill west of the 'Petite France' district in Strasbourg. It was constructed from 1686 to 1700 by the French Engineer Jacques Tarade according to plans by Vauban. Several stories high, it houses sculptures in its main level and a panoramical terrace on its roof.
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.