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
Land reclamation in Monaco Monaco. Land has also been added to areas of La Condamine and Larvotto/Bas Moulins. Prince Albert's father, Rainier III, was known as the "Builder Prince". In an attempt to further develop the economy of Monaco, he first supported the idea of land reclamation. Since it was impossible to extend into France, the only solution was to reclaim land from the sea. First, the Larvotto beach district was created in the early 1960s, then the Fontvieille industrial area, increasing the principality's surface area by approximately 20 percent. More recently, Port Hercules has been extended to welcome larger cruise ships on one