This volume features a bloc of materials devoted to the 70th anniversary of Aktion Reinhardt: Rachela Auerbach’s unique reportage Na polach Treblinki [on the fields of Treblinka], written in 1946 in Yiddish and only now translated into Polish, the revealing study penned by Caroline Strudy Colls from Staffordshire University in England about her archeological works conducted at the former death center in Treblinka. The remaining texts published in this volume revolve around several topics such as forced labor camps, the sheltering of Jews and the moral dilemmas associated with that, collaboration and meting out justice to Holocaust perpetrators, German Jews in the Łódź ghetto, human remains at the Auschwitz-Birkenau Museum, and photographic representations of the Holocaust experience. On the occasion of the Year of Korczak we present a previously unpublished set of his letters written at his orphanage during 1940‒1941 and the history of Korczak’s texts that survived the ghetto.