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
History of Monaco escaped arrest and fled to Switzerland. In August 1944, the Germans executed René Borghini, Joseph-Henri Lajoux and Esther Poggio, who were Resistance leaders. Under Prince Louis' secret orders, the Monaco police, often at great risk to themselves, warned in advance those people whom the Gestapo planned to arrest. The country was liberated, as German troops retreated, on 3 September 1944. The current ruler, Prince Albert II, succeeded his father Prince Rainier III in 2005. Prince Rainier, in turn, had acceded to the throne following the death of his grandfather, Prince Louis II, in 1949. The revised Constitution of Monaco, proclaimed