The Gravensteen (Dutch; literally "Castle of the Counts") is a medieval castle at Ghent, East Flanders in Belgium. The current castle dates from 1180 and was the residence of the Counts of Flanders until 1353. It was subsequently re-purposed as a court, prison, mint, and even as a cotton factory. It was restored over 1893–1903 and is now a museum and a major landmark in the city.
https://en.wikipedia.org/wiki/Gravensteen
https://visit.gent.be/en/see-do/castle-counts