Louis XVI (Louis-Auguste; ; 23 August 175421 January 1793) was the last King of France before the fall of the monarchy during the French Revolution. He was referred to as "Citizen Louis Capet" during the four months just before he was executed by guillotine. In 1765, upon the death of his father, Louis, Dauphin of France, he became the new Dauphin. Upon his grandfather Louis XV's death on 10 May 1774, he assumed the title King of France and Navarre, until 4 September 1791, when he received the title of King of "the French" until the monarchy was abolished on 21 September 1792.