The Florennes Castle in Florennes, Namur, Wallonia, Belgium, is a castle that dates back to the 9th century, although the most of the modern structure is much more recent.
Wikipedia https://en.wikipedia.org/wiki/Florennes_Castle
Address 20 Rue Montagne de la Ville, Florennes 5620, Belgium
Coordinates 50°15'4.271" N 4°36'3.42" E