Jan Ferdynand Olszewski ['jan ɔlˈʂɛfskʲi] (born August 20, 1930 in Warsaw) is a Polish conservative lawyer and politician. Olszewski served as the Prime Minister of Poland for five months between December 1991 to early June 1992, and later became a leading figure of the national conservative Movement for the Reconstruction of Poland. Olszewski's premiership was the second shortest in the history of the Third Republic.