He was born on 31 January 1882 in Skrzydłów and died on 14 October 1941 in the Auschwitz concentration camp. He was the brother of Leona Zawadzka, a Polish educational activist who was among the creators of the Polish education system before World War I and in the first years of Poland’s independence. He studied law at the University of Warsaw and history at the University of Lviv. Before World War I, he was active in the “Zet” Union of Armed Youth. From 1920 to 1939, he was the head of the Central Archives of Historical Records in Warsaw. In 1938, he became Professor at the Jagiellonian University. In 1931–1932, he headed the Society of History Enthusiasts. During the German occupation he was arrested in June 1941. He was imprisoned in the Auschwitz-Birkenau concentration camp where he was subsequently murdered. His works included: Ustrój Rzeczypospolitej Polskiej [“Political system of the Republic of Poland”] (1915), Podział historyi ustroju Polski na okresy [“Division of the history of Poland’s political system into periods”] (1925), Polska kultura polityczna wieku XVI w. (Kultura staropolska) [“Polish political culture of the 16^th century (Old Polish culture)”] (1932), Polskie zbiory rękopiśmienne przed wojną, podczas wojny i po wojnie [“Polish collections of manuscripts before, during and after the war”] (1941).