"Judensau (German for "Jews' sow" or "Jewish sow")] is a derogatory and dehumanizing image of Jews in obscene contact with a large sow (female pig), which in Judaism is an unclean animal, that appeared during the 13th century in Germany and some other European countries; its popularity lasted for over 600 years" (Wiki). Still "in situ" within a WHS. Those in Wittenberg and Regensburg have nearby "explanatory" plaques which have been criticised for not being "explanatory" and "critical" enough.
World Heritage Sites connected to 'Judensau':