Home to the oldest university in Germany, Heidelberg suffered during 17th-century wars and was rebuilt in the 18th century, using the old Gothic street layout but with Baroque buildings. The historic city centre's Gothic streets are easy to navigate on foot. Fourteenth-century Heidelberg Castle is the symbolic heart of the city. The Alte Brucke is a beautiful 18th-century bridge. This university town also has a historic Student Jail, for visitors who take their history and education seriously.