Armand Emmanuel Sophie Septemanie du Plessis, duc de Richelieu (1766 - 1822) was a prominent French statesman during the Bourbon Restoration. As a Royalist aristocrat, during the French Revolutionary Wars and Napoleonic Wars, he served as a soldier in the Russian Imperial Army.

He was present at Alexander Suvorov's capture of Izmail. For his service in that battle, he was decorated by the Russian empress Catherine the Great with the Order of St. George and given a golden sword. In the Russian army, he achieved the rank of Major General. Russian emperor, Czar Alexander I, was one of his friends and in 1803 Alexander appointed him Governor of Odessa. In the eleven years of his administration, Odessa rose from a miserable village to an important city, and the grateful Odessansites erected a bronze monument to him. More about duc de Richelieu