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 II, Prince of Monaco Honoré II, Prince of Monaco Honoré II (24 December 1597 – 10 January 1662) was Prince of Monaco from 1604 to 1662. He was the first to be called Prince, but started his reign as Lord of Monaco. Honoré II was born on December 24, 1597. He was the son of Hercule, Lord of Monaco (24 September 1562 – 21 November 1604) and Maria Landi. His father was murdered when he was six, and he succeeded under the regency of his uncle, Frederico Landi, 4th Prince of Val di Taro. Landi was a loyal ally and friend of Spain and