Józef Feldman (1899-1946), a modern historian, professor of the Jagiellonian University. The son of Wilhelm Feldman, a literary critic and publicist, and, Mary, née Kleinman, a translator, he worked on a doctoral thesis under supervision of Władysław Konopczyński, a promoter od Feldman's talent and university career. Due to his Jewish origins, he hid under the assumed name of Józef Sokołowski during the Nazi occupation. He was an author of fundamental works about the 18th century, such as "Poland during the Great Northern War 1704-1709" (1925); "Poland and the eastern policy 1709-1714" (1926); "Polish-French relations 1774-1787. Vergennes on Poland" (1935). In the 1930s, he abandoned the Enlightenment in favour of the Polish-German relations in the 19th century, his best-known book being "Bismarck and Poland" (1938). Feldman's works related to the Polish-German relations during the Partitions, though written in suggestive language and based on extensive source queries, did not encompass Prussian archives, to which the descendants of the Iron Chancellor did not grant him access. This sparked criticism from Henryk Wereszycki and Jerzy Zdrada.