Monaco succession crisis of 1918

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The Monaco succession crisis of 1918 arose because France objected to the prospect of a German national inheriting the throne of the Principality of Monaco. Prince Albert I had only one legitimate child, the Hereditary Prince Louis, then heir apparent to the principality. As World War I drew to a close, Prince Louis, at the age of forty eight, remained without legitimate issue, unmarried, and unbetrothed.

Louis' nearest legitimate next of kin was Prince Albert I's first cousin Wilhelm, 2nd Duke of Urach (1864–1928). He was born in Monaco in 1864, and was largely raised there as a Francophone Catholic by his mother after her widowhood in 1869. He was educated at the former Jesuit School until 1882. He was, however, a Württemberg national, and his adult domicile and main assets (including Lichtenstein Castle) were in Württemberg. Although he was awarded the Grand Cross of Monaco's Order of Saint Charles and was a knight of the Sovereign Military Order of Malta, he also was awarded much later the Grand Cross of the Order of the Crown of Württemberg and was a knight of Kaiser Wilhelm II's Order of the Black Eagle. Although he was ineligible to inherit the crown of his patrilineal ancestors in Germany, given the line of succession to the Monegasque throne at that time, there was every likelihood that the principality would pass by lawful inheritance into Wilhelm's "German hands" upon the death of Prince Louis. Moreover, while the House of Grimaldi had close ties to France due not only to geographical proximity, but also to possession of estates (vaster by far than the territory of the principality) and financial investments there, nothing officially prevented the dynasty's political or cultural associations from focusing elsewhere. Moreover, the hereditary principle allocated monarchies according to one form or another of proximity of blood, and the Grimaldis' hitherto exclusive control of Monaco's dynastic marital policy was what threatened to enthrone a German duke on France's border, even after the Empire's defeat in war. Just as the ruling families of Britain, Russia, Belgium, and the Netherlands had all become patrilineally German by the twentieth century due to the propensity of monarchical heiresses, seeking dynastically equal marriages, to choose husbands from among Germany's many minor princely families, Monaco was on the verge of the same fate. Although the Grimaldis did not require inter marriage with royalty by law as German dynasties typically did, by custom they never married subjects of their own realm, and no Monégasque reigning prince or heir had wed a French consort in more than a century. This led to the end of absolutism, at least on paper, and also as a part of the overall resolution the Duke of Urach's claim was relegated behind that of Albert's newly recognised granddaughter Charlotte Louvet (see below).

The solution was an unequal treaty between France and Monaco which formalized and rendered permanent the latter's position as a client state: Not only did it require Monaco to conduct its foreign relations in consultation with or through France, but it obliged the dynasty to obtain French authorization for marital alliances or changes in succession, and declared that should the throne become vacant Monaco would become an official protectorate under French jurisdiction – while retaining nominal independence. A Monégasque ordinance of 15 May 1911 acknowledged the child as Louis' daughter, and admitted her into the Grimaldi dynasty.

Charlotte was formally adopted by her own father Louis at the Monégasque embassy in Paris on 16 May 1919, in the presence of her grandfather Albert I, the French president Poincaré, and the mayor of Monaco. There is a doubt on the legality of the adoption. The Monégasque civil code (articles 240 and 243) required that the adopting party be of at least age fifty and the adoptee of at least age twenty one. The 1918 ordinance changed the adoptee's minimum age to eighteen (Charlotte was twenty at the time of adoption) but not the other age limit, Prince Louis then being only aged forty eight.

In 1930 the Chicago Daily Tribune reported that Wilhelm's third son Prince Albrecht had met with French officials in Paris, hoping to be approved by them as Louis' heir. 'He believes that the scandal surrounding Princess Charlotte's divorce "will help him win his case." He is now in Paris in "an attempt to make good his claim". The Urach branch of the family assert "that according to the Monaco constitution such an adoption becomes illegal until all members of the family approve it." The Urachs, a "German branch of the family," said they were never asked for their approval and "never approved of the adoption".' Prince Albrecht could argue that his mother was descended from Louise Élisabeth of France, and so considering the Treaty of 1918 he was more French than his father, and had been educated in Paris. Evidently his claim was rebuffed.

By a declaration of 30 May 1944 in Paris, Charlotte ceded her rights to the throne to her only son (with a reservation if he should pre decease), and Rainier accepted in Paris on 1 June. An ordinance of 2 June 1944 acknowledged and confirmed the Sovereign Prince's assent to those declarations, and Rainier was made Hereditary Prince. When the Journal de Monaco published the ordinance on 22 June 1944, it added: "His Excellency the comte de Maleville, minister of Monaco in France, has been asked to inform the French government 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. "A German reign over Monaco, on the eve of the First World War was simply unacceptable for France" said the count’s lawyer, Jean Marc Descoubès. His initial lawsuit was dismissed because he did not prove his relation to Duke Wilhelm II. He filed an amended lawsuit in 2021 which included a report from a genealogist.