Maximilian de Beauharnais, 3rd Duke of Leuchtenberg

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Maximilian de Beauharnais
Portrait by Karl Briullov, 1849
Duke of Leuchtenberg
Reign	28 March 1835 – 1 November 1852
Predecessor	Auguste de Beauharnais
Successor	Nicholas Maximilianovich
Born	(1817-10-02)2 October 1817 Munich, Kingdom of Bavaria
Died	1 November 1852(1852-11-01) (aged 35) Saint Petersburg, Russian Empire
Spouse	Grand Duchess Maria Nikolaevna of Russia ​ ​ (m. 1839)​
Issue	Princess Alexandra Maria, Princess Louis William of Baden Nicholas, Duke of Leuchtenberg Eugenia, Duchess Alexander of Oldenburg Eugen, Duke of Leuchtenberg Prince Sergei Georgi, Duke of Leuchtenberg
Names Maximilian Joseph Eugene Auguste Napoleon
House	Beauharnais
Father	Eugène de Beauharnais
Mother	Princess Augusta of Bavaria

Maximilian Joseph Eugene Auguste Napoleon de Beauharnais, 3rd Duke of Leuchtenberg, Prince Romanowsky (2 October 1817 – 1 November 1852) was the husband of Grand Duchess Maria Nikolayevna of Russia and first cousin of Emperors Napoleon III of the French and Francis Joseph I of Austria. He was a grandson of Napoleon I's first wife, the Empress Josephine, by her prior marriage to Alexandre de Beauharnais.

A student of Moritz von Jacobi, he is known as one of pioneers in galvanoplasty and an expert in copper and bronze metalworks generally, as well as an art collector.