The attention that the charged topic of Polish–Jewish relations during the Holocaust has attracted raises many important questions about Jewish society during the Holocaust and the actions of Jewish individuals and groups in the face of the extermination. The purpose of this publication is to present past and present research literature, highlighting several common limitations and failures exhibited in quantitative studies on the topic, and proposing new lines of inquiry into the question of Jewish–Polish relations during the Holocaust. This publication is composed of three parts, each addressing a different aspect of research on the topic – Jewish–Polish Relations in the Historiography; Some Remarks About Secret Cities; Research on the Rescue of and Harm Inflicted on Jews During the Holocaust.