Education
Jagiellonian University.
Jagiellonian University.
Zakrzewski was associated with National Democracy, then with Józef Piłsudski. Zakrzewski was a researcher of political issues of Poland from 10th to 13th century. He was an author of critical studies of medieval sources.
His notable works includes Mieszko I jako budowniczy państwa polskiego (1922), Bolesław Chrobry Wielki (1925).
He was a professor of Lviv University (since 1907), member of Polish Academy of Learning (since 1919), chairman of Polish Historical Society (1923–1932. 1934–1936), senator from Non-partisan Bloc for Cooperation with the Government (1928–1935).