In the Franconian Alb, between the Bavarian cities of Nuremberg and Munich, is the largest mining area for natural stone in Germany. There, the Jura marble, also called Jura or Jurassic lime, is mined. It is a pale yellow to blue-gray limestone, which has been used for centuries for gala products as well as for the construction of historic buildings in the region. Among other things, it was involved in the construction of the Eichstätt Cathedral.