The Lérins Islands (in French: les Îles de Lérins, pronounced [lɛz‿il də leʁɛ̃s]) are a group of four Mediterranean islands off the French Riviera, in Cannes. The two largest islands in this group are the Île Sainte-Marguerite and the Île Saint-Honorat. The smaller Îlot Saint-Ferréol and Îlot de la Tradelière are uninhabited. Administratively, the islands belong to the commune of Cannes. The islands are first known to have been inhabited during Roman times. The Île Sainte-Marguerite held a fortress where the Man in the Iron Mask was held captive for a time.