In 1159 it burnt down, and was rebuilt and extended between 1162 and 1180. Under Emperor Frederick II it became "reichsfrei" (territorially independent). The abbey however declined during the 13th and 14th centuries and suffered during the Reformation.
The church was demolished. The remaining premises were used among other things as a psychiatric hospital and as a barracks. They now accommodate a number of administrative and educational functions and the Archaeological Museum of Baden-Württemberg.