The site of Flexburg Castle was inhabited in antiquity, probably as early as the Bronze Age, then reoccupied in the thirteenth century, first mentioned in 1220; The castle was of great military importance because its forces controlled a junction between the Plain and the Vecht Valley, and served as the residence of Conrad Werner of Hallstatt, the imperial ruler in the late 13th century. Visitors go to this castle to learn about its history and enjoy the views and the natural surroundings, do not miss visiting it.