Franz (Ferenc, François) Kleinberger (8 June 1858 in Budapest - 10 June 1937 in Paris) was a European art dealer. He set up a gallery called at 9 Rue de l’Échelle in Paris, either in January, 1883, or on February 15, 1883, principally involved in selling to US buyers. The year 1848 appears too, but must be wrong, since he was born in 1858. Here is the source for the obviously wrong year of opening his gallery in Paris. By 1913, according another source after the First World War, he had set up a gallery on lower (first at No. 709, then at No. 725) Fifth Avenue in New York, near the Duveen Gallery. Harry S. Sperling took over as the firm's president after Kleinberger's death 1937.