Edited sentence: , Polish local authorities and the Institute of National Remembrance obstruct the placement of Stolpersteine, with many petty bureaucratic hurdles preventing placement of the stones.As a result, while Stolpersteine are common elsewhere in Europe, they are rare in Poland, despite Poland having the largest pre-war Jewish population (3 million).Families of the victims see the obstructionism of Polish authorities as being motivated by antisemitism and fear of claims for the return of the property stolen from the victims