Where: Raabs an der Thaya, Austria

Start of construction: 11th Century

reconstruction: 16th Century

Accessible: yes, but only after appointment

Important fact:

the original name of the castle was Ragoz.
A name later transformed to Rakousko by the Czechs, which was an early name

for the area that is now Austria.

https://www.raabs-thaya.gv.at/Burg_Raabs