Stalag XXI-A was a German Army World War II prisoner-of-war camp located in Ostrzeszów in German-occupied Poland.

[2][3][4] Also Franciscans from Niepokalanów were held there, including Maximilian Kolbe,[4][5] who was later killed in the Auschwitz concentration camp and is now considered a saint of the Catholic Church.

[3][7] There were cases of abuse of wounded or sick POWs by German doctors, and one even recommended "treating dysentery patients with starvation.

[11][12][6][13] In August 1940, British Expeditionary Force POWs from the Battle of Dunkirk were brought to the camp.

[16] A local unit of the Home Army resistance organization facilitated the escape of five Polish POWs from the camp in March 1940, and also smuggled Polish underground press to the camp, and smuggled a radio for the British POWs.