Hohentwiel
Hohentwiel, one of the oldest castles in Germany was in the 10th century the seat of Hadwig, duchess of Swabia by marriage. Hadwig played an important role in the rebellions of her brother, Henry the Quarrelsom. She held the impregnable fortress against imperial forces and remained in control of parts of Swabia long after the rebellions had been crushed. Hadwig is also famous for her relationship with the monk Eckehard recounted by Victor von Scheffel in his 1855 bestseller “Eckehard”.