Fort de la Conchée is a fortification on the rocky island of Quincé, four kilometers north-west of St Malo, France. Constructed by Sébastien Vauban the fort covers almost the entire island. The fortress consists of a service building built on high, thick granite masonry walls two stories high. An oval upper terrace with embrasures facing the open sea served as the fort's site for the fort's battery. Today, the fort is a nature reserve for seabirds.