Ludwik Kalkstein
1920–1994 (age 74)
Biography
Ludwik "Hanka" Kalkstein (13 March 1920, in Warsaw– 26 October 1994, in Munich) was a Polish Nazi collaborator. He worked as a Nazi police agent during the German occupation of Poland and then as a Stalinist informant after the Soviet takeover of Poland. Along with his wife (Blanka Kaczorowska "Sroka", b. 13 October 1922 in Brest, d. 25 August 2004), they became traitors to the Polish AK resistance organization. Kalkstein was responsible for the arrest and execution by the Nazis of at least 14 officers of the Polish underground, including General Stefan Rowecki.