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
Honoré V, Prince of Monaco Although Honoré V never married, he did have a son. Louis Gabriel Oscar Grimaldi was born in Paris on 9 June 1814 and died in Saint-Germain-en-Laye on 15 July 1894. Louis Gabriel Oscar Grimaldi was legitimized, however it was his younger brother, Prince Florestan, who succeeded him. Honoré V, Prince of Monaco Honoré V (13 May/14 May 1778 in Paris – 2 October 1841 in Paris) was Prince of Monaco and Duke of Valentinois. He was born Honoré Gabriel Grimaldi, the first son of Honoré IV of Monaco and Louise d'Aumont. A professor of the period, one Victor de la