Nicolas Fouquet
In 1572 the monks of the abbey of Ste Croix at Quimperlé ceded the island to the Retz family, in whose favour it was raised to a marquisate in the following year. It subsequently came into the hands of the family of Fouquet. The island's fortifications were erected by Vauban on behalf of Nicolas Fouquet, prior to Fouquet incurring the displeasure of Louis XIV; the land was ceded to the crown in 1718.