Where: Balduinstein, Germany
Start of construction: 12th Century
End of construction: 13th Century
Most important renovation: 19th Century
Accessible: no, private property
Important fact:
Current Gothic Revival exterior came after a renovation that lasted from 1850-1855.
There are plans to open the castle to the public in the future (For more information see the castle's website), but first a thorough renovation is to be carried out.
http://www.eventsimschloss.de/