Rainier III, Prince of Monaco Rainier III, Prince of Monaco Rainier III (Rainier Louis Henri Maxence Bertrand Grimaldi; 31 May 1923 – 6 April 2005) ruled the Principality of Monaco for almost 56 years, making him one of the longest ruling monarchs in European history. Though internationally known for his marriage to American actress Grace Kelly, he was also responsible for reforms to Monaco's constitution and for expanding the principality's economy beyond its traditional casino gambling base. Gambling accounts for only approximately three percent of the nation's annual revenue today; when Rainier ascended the throne in 1949, it accounted for more than 95 percent. Rainier
Antonio I, Prince of Monaco to King Louis XIV of France in the Parlement on account of being Duke of Valentinois and a Peer of France. He was made a knight of the French royal orders in 1724. Antonio married 13 June 1688 Marie de Lorraine, ""Mademoiselle d'Armagnac"" (12 August 1674 – 30 October 1724), daughter of Louis of Lorraine, Count Armagnac. They had six daughters of whom only three survived infancy : Antonio also had a number of illegitimate children: Schwennicke, Detlev (Ed.) "Europäische Stammtafeln", J.A. Stargardt Verlag, Marburg, volume II, table 201. Antonio I, Prince of Monaco Antonio I (25 January 1661 –