Baden -Württemberg's popularity is rivaled only by that of Bavaria. It offers the charming university towns of Heidelberg, Tübingen, and Freiburg, glorious castles. For all castle fanatics amongst you, the Hohenbaden Castle, built in , and known locally as the Altes Schloss (Old Castle), is an absolute must! It was home. Numerous castles can be found in the German state of Baden -Württemberg. These buildings, some of which have a history of over years, were the setting.