Where: Rastatt, Germany

Constructed: 1700-1707

End of construction: 19th Century

Most important renovation: 20th Century

Accessible: yes, with a guide

Important fact:

The castle survived WWII relatively unscathed.

The castle complex is also home to two museums (military history & memorial site for the German liberation movement.

https://www.schloss-rastatt.de/en/home