Where: Oostmalle, Belgium

Start of construction: 1545-1548

End of construction: 19th Century

Most important renovation: 20th Century

Accessible: yes, but limited

Important fact:

The oldest part of the castle is the round keep that dates from a 15th century castle that was destroyed in 1542. The park around the castle is freely accessible.

https://www.domeinderenesse.be/