Louis, Dauphin of France (4 September 1729 – 20 December 1765) was the only surviving son of King Louis XV of France and his wife, Queen Marie Leszczynska. Son of the king, Louis was styled Fils de France. As heir apparent, he became Dauphin of France. However, he died before ascending to the throne. Three of his sons became kings of France: Louis XVI (reign: 1774–1792), Louis XVIII (reign: 1814–1815; 1815–1824) and Charles X (reign: 1824–1830).