GRAFENSCHLOSS DIEZ

Where: Diez, Germany

Start of construction: 11th Century

End of construction: 18th Century.

Most important renovation: 18th Century

Accessible: yes, as a museum guest

Important fact:

Present exterior dates back from the 18th century. From 1778 to 1928, the castle was used as a prison. Today it is used as a youth hostel and regional museum.