The Man in the Iron Mask was a mysterious prisoner in France during the late 17th century. He was held in various prisons, including the Bastille, and is famous for wearing a mask made of iron, although some believe it was made of cloth. His true identity remains unknown, leading to numerous theories, including that he was a twin brother of King Louis XIV. The story of the Man in the Iron Mask has inspired many works of literature and film. His tale raises questions about power, secrecy, and the nature of identity, making him a lasting symbol of intrigue in French history.