The most famous place on the Neckar River is Germany’s oldest university town, Heidelberg, dominated by the ruins of its famous 14th-century castle. Other attractions include more than 10 museums; the ‘Giant Cask’ in the cellar holding 220,000 liters (48,422 gallons); Church of the Holy Ghost; St Peter’s Church; Karlstor (gate); and wine taverns. The castle is partly Renaissance, partly Gothic and Baroque in style, and serenade concerts take place during the summer in the courtyard. Another highlight is the German Museum of Pharmacy.