Rainier III, Prince of Monaco Our Lady Immaculate, the resting place of previous sovereign princes of Monaco and several of their wives, and the place where Prince Rainier and Princess Grace had been married in 1956. Because his death occurred shortly after that of Pope John Paul II, Rainier's death was overshadowed in the media. "See also: List of titles of the Monegasque Crown" 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
Albert II, Prince of Monaco his father and died without lawful heirs, it would have triggered Article 3 of the 1918 Franco-Monegasque Treaty, according to which the Principality of Monaco would become a protectorate of the French Republic. Prior to 2002, Monaco's constitution stipulated that only the last reigning prince's "direct and legitimate" descendants could inherit the crown. On 2 April 2002, Monaco promulgated Princely Law 1.249, which provides that if a reigning prince dies without surviving legitimate issue, the throne passes to his legitimate siblings and their legitimate descendants of both sexes, according to the principle of male-preference primogeniture. Following Albert's accession, this law