High Quality Content by WIKIPEDIA articles! Wac aw Sobieski (October 10, 1872 in Lwów April 3, 1935 in Kraków, Poland) was a Polish historian, professor of the Jagiellonian University in Kraków, member of the Polish Academy of Learning (Polska Akademia Umiej tno ci (PAU), and author of many works on the history of Poland especially of the 17th century. He was an indirect descendant of King Jan III Sobieski.