On the grounds of Heidelberg Castle, the German Museum of Pharmacy covers the history of apothecaries during the 18th and 19th centuries.
Displays include fascinating old instruments and equipment for grinding, blending, distilling, and otherwise preparing the remedies.
Others show examples of the various elements that went into these preparations, including plants, minerals, and animal-based materials.
A few of the exhibits are interactive, and although the labeling is in German, a very good audio guide is available.