Armand-Emmanuel_de_Vignerot_du_Plessis,_duc_de_Richelieu

Armand Emmanuel Sophie Septimanie de Vignerot du Plessis, 5th Duke of Richelieu and Fronsac (25 September 1766 – 17 May 1822), was a French statesman during the Bourbon Restoration. He was known by the courtesy title of Count of Chinon until 1788, then Duke of Fronsac until 1791, when he succeeded his father as Duke of Richelieu.
As a royalist, during the French Revolutionary Wars and Napoleonic Wars, he served as a senior officer in the Imperial Russian Army, achieving the grade of major general. Following the Bourbon Restoration, he returned to his homeland and was twice Prime Minister of France.