Selected materials related to concentration camps Bełżec, Treblinka, Chełmno, Majdanek, Auschwitz-Birkenau, Płaszòw, and Gross-Rosen; ghettos in Warsaw, Siedlce, and Limanowa; and the labor camps for Jews in Poznań: testimony of witnesses and suspects, photographs, postcards, letters, certificates of death, travel passes, texts of prayers, staff lists, lists of ex-prisoners, documents of Poland’s military mission in London, daily reports of the Leiter des Ordnungsdienstes (Head of Order Service) of the Warsaw ghetto.