The Fort des Têtes, also known as the Fort des Trois-Têtes, is a fortification in the vicinity of Briançon in the Dauphiné region of southeastern France. It was first surveyed by Vauban in 1700. In 1709 the Marshal Berwick established a fortified camp on the plateau, overlooking the valley of the Durance from a height of 1,440 metres (4,720 ft). The position controlled the high valleys of Fontenil and Fontchristiane. A permanent bastioned triangular fort was built between 1721 and 1723 to designs by Tardif and Nègre. The position was used by the French Army in the defense of Briançon until 1940, when it was part of the Fortified Sector of the Dauphiné.