Karl Albrecht collected the basis of the museum's collection of medieval crime at the turn of the XIX-XX centuries. In future, spouse painters Ernst Paul Hinckledey and Martha Hinckledey-Wittke took up the initiative. Their son Christoph expanded the collection and in 1993 gave it to the city. Now it is one of the largest museums of its kind in Europe with more than 50 thousand exhibits, some of which have a history of a thousand years. It exhibits instruments of torture; there is information about how laws were made and proceedings were conducted in the old days, about what the Inquisition and the police did, and what the legal status of women in medieval society was.