The Man in the Iron Mask is the name given to an unidentified prisoner who was arrested in 1669 or 1670 and subsequently held in a number of French prisons, including the Bastille and the Fortress of Pignerol (modern Pinerolo, Italy). Recent research suggests that his name might have been "Eustache Dauger", but this still has not been completely proven. He was held in the custody of the same jailer, Bénigne Dauvergne de Saint-Mars, for a period of...