Duke of Leuchtenberg
noble title

Duke of Leuchtenberg was a title created twice by the monarchs of Bavaria for their relatives. The first creation was awarded by Maximilian I, Elector of Bavaria to his son Maximilian Philipp Hieronymus, upon whose death without children the lands passed back to his nephew Elector Maximilian II. It was re-created by Maximilian I Joseph, King of Bavaria on 14 November 1817 and awarded to his son-in-law, Eugène de Beauharnais, styled Royal Highness by personal grant, and with the style Serene Highness for his agnatic descendants. Eugène was the adopted stepson of the deposed Emperor Napoleon I of France, and had previously held the title of French prince (Prince français) with the style Imperial Highness. He also had been the emperor's heir in Frankfurt and briefly in Italy. King Maximilian Joseph compensated his son-in-law after he lost his other titles and named him heir to the kingdom after the male-line descendants of the royal house and next in precedence after the Royal Family.
The subsidiary title, also in the Bavarian peerage, was Prince of Eichstätt, but its attached territory was sold off by the 4th Duke to the King of Bavaria in 1855. On 14 July 1839, Emperor Nicholas I of Russia granted the Russian and Finnish style Imperial Highness, alongside the subsidiary title Prince Romanovsky, to the 3rd Duke, Maximilian, who had just married his daughter, Grand Duchess Maria Nikolaevna.
Nicholas Maximilianovich, 4th Duke of Leuchtenberg, was created Duke of Leuchtenberg in the Russian Empire in 1890 by Alexander III of Russia, as the ducal family was by then composed of members of the extended Russian Imperial Family. This creation once again confirmed the elevation of the style from Serene to Imperial Highness, and was to be carried by all male line descendants of Nicholas born of marriages of the corresponding rank, of the incumbent Duke from 1852 to 1891. The title was largely ceremonial, with no lands or governance attached; the style and title became "Duke von (or of) Leuchtenberg, de Beauharnais".
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This entry incorporates text from “Duke of Leuchtenberg” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.