Monaco succession crisis of 1918 of this event, pursuant to the clauses of the treaty of 17 July 1918." The French government at the time was still the Vichy regime. Louis II died on 9 May 1949. The Principality of Monaco passed to his grandson, Rainier III. In the absence of an heir male, the ducal titles of Valentinois and Estouteville became extinct in French nobiliary law. Before Rainier III married Grace Kelly in April 1956, he notified the French government of his plans; the French ministry of foreign affairs replied with a message of official congratulations. Count Louis de Causans is suing the French
Jacques, Hereditary Prince of Monaco When referring to Jacques in French, the palace has used the term "Prince Héréditaire" to refer to the prince. However, when mentioning the prince in English, the palace has referred to Jacques as "Crown Prince" instead of "Hereditary Prince." Jacques, Hereditary Prince of Monaco Jacques, Hereditary Prince of Monaco, Marquis of Baux (Jacques Honoré Rainier Grimaldi; born 10 December 2014), is the heir apparent to the Monegasque throne. He is the son of Prince Albert II and Princess Charlene and twin brother of Princess Gabriella. On 30 May 2014, it was announced that Princess Charlene was pregnant. After much speculation