Where: Isselburg, Germany Start of construction: 12th Century End of construction: 17th Century Most important renovation: 20th Century Accessible: yes, interior only with guide Important fact: 70% of the castle was destroyed at the end of the war in 1945. It was rebuilt afterwards. Part of the castle contains a museum with more than 700 paintings. Another part is still used as a residence and is not accessible. http://www.wasserburg-anholt.de/index.php/nl/