Where: Nikolsdorf, Austria
Start of construction: 12th Century
End of construction: 15h Century
Most important renovation: 20th & 21st Century
Accessible: no
Important fact:
At the beginning of the 20th Century bought by a Dutch business man with close connections to the Dutch Royal family (The Oranjes).
Queen Wilhelmina (1880-1962) spent many summer holidays at this castle.