Armand Emmanuel de Vignerot du Plessis, 5th Duke of Richelieu

Armand Emmanuel Sophie Septimanie de Vignerot du Plessis, 5th Duke of Richelieu and Fronsac, 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.