Count Stanislas Potocki (1755-1821) Polish nobleman, collector and connoisseur. He met David in Rome during his Grand Tour in 1779-80 and commissioned there his equestrian portrait, which was finished a little later in Paris. Back in Poland, Stanislas Potocki pursued a political career and held a number of offices; as minister of education he helped to found the Warsaw University. His sons were in Russian service and are remembered in Russian history.
See:
Jacques-Louis David. Portrait of Count Stanislas Potocki. Bibliography:
Famous Russians in the 18th and 19th centuries. St. Petersburg. 1996.
David. by Simon Lee. Phaidon. 1999