The disintegration of the USSR, and of the communist system, in the last decade of the twentieth century, the rekindling of ethnic strife, and scholarly research into nationalism – all have renewed interest in the images that different ethnic and religious groups in eastern Europe have had of each other. In this context, the image of Jewishness has been of particular importance, both in political science and in history. An adequate analysis of ideas about Jewishness requires access to numerous mass sources. However, the number of sources available for this kind of enquiry is limited, compared, for instance, to the sources open for traditional Hebrew studies. This is especially true when we speak about the periods of autocracy and dictatorship. Both the Russian Empire and the USSR had – besides periods of overt anti-Semitism – a tradition of hidden anti-Semitism. The hidden and unofficial nature of this prejudice would not allow for mass opinion polls on anti-Semitism before the fall of the USSR.