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
Leopold III, Prince of Lippe Leopold III, Prince of Lippe Leopold III of Lippe (Paul Friedrich Emil Leopold; 1 September 1821 – 8 December 1875) was the sovereign of the Principality of Lippe reigning from 1851 until his death. Leopold III was born in Detmold the eldest child of Leopold II, the reigning prince of Lippe and his consort Princess Emilie of Schwarzburg-Sondershausen (1800–1867). Being the heir apparent to the throne from birth he had the title Hereditary Prince. He succeeded as Prince of Lippe on 1 January 1851 following the death of his father. A year after succeeding to the throne Leopold was married