Fabian Gottlieb Fürst von der Osten-Sacken (Russian: ?????´? ??????´??????? ?´????-??´???; 20 October [O.S.
9] 1752 – 7 April [O.S.
26 March] 1837) was a Baltic German Field Marshal who led the Russian army against the Duchy of Warsaw and later governed Paris during the city's brief occupation by the anti-French coalition.