Ars-en-Ré is a commune on the Île de Ré in the western French department of Charente-Maritime, in Nouvelle-Aquitaine. Formerly ca…Ars-en-Ré is a commune on the Île de Ré in the western French department of Charente-Maritime, in Nouvelle-Aquitaine. Formerly called just Ars, the commune changed to its current name on 8 March 1962.