Louis XVII was the younger son of King Louis XVI of France and Queen Marie Antoinette. His older brother, Louis Joseph, Dauphin of France, died in June 1789, a little over a month before the start of the French Revolution. At his brother's death he became the new Dauphin, a title he held until 1791, when the new constitution accorded the heir apparent the title of Prince Royal. Born: March 27, 1785 Died: June 8, 1795 In office: 1793 – June 8, 1795 Wiki link