The Main Building features the newly renovated upper Gallery of the Twentieth Century Polish Art, one of the largest galleries of painting and sculpture from the late 19th century on in Poland, with most celebrated artwork by Jacek Malczewski, Leon Wyczółkowski, Włodzimierz Tetmajer; an extensive collection of works by Stanisław Wyspiański; and also, works by artists of the interwar and postwar periods: the Polish cubists, expressionists, colorists, the avant-garde of the 1930s, and representatives of New Directions from the 1960s.[1]