The Imhoff-Schokoladenmuseum (Imhoff chocolate museum) was opened by Hans Imhoff on 31 October 1993. It is situated in the Cologne quarter of Altstadt-Süd on the Rheinauhafen peninsula. The exhibits show the entire history of chocolate, from its beginnings with the Olmecs, Maya and Aztecs to contemporary products and production methods. With 5,000 guided tours and 675,000 visitors a year, the museum is in the Top Ten of German museums. The museum is entirely self-supporting, receiving no subsidy. It has its own marketing department and is used by the Schokoladenmuseum Gastronomie GmbH for events.