Opposite the cathedral, the museum houses the Domschatz (Cathedral Treasury). Other collections chronicle the art and cultural history of Speyer and the Pfalz from the Stone Age to modern times. Don't miss the "Golden Hat of Schifferstadt," a Bronze Age headdress used in religious ceremonies dating back to approximately 1300 BC. The Wine Museum houses the world's oldest bottle of wine, which is still liquid and dates to circa AD 300. The giant 35-foot-long wooden winepress from 1727 is also worth a look.