Glad you enjoyed your trip to Ghent!
I used to study there, it's a beautifull city with several great spots.
About the Gravensteen: There's a story about students 'attacking' the Gravensteen on the 16th of November 1949. As there was just 1 guard at the entrance, the students managed to conquer the castle. They did so because the prices of the beer were risen and they just wanted to organize a student joke.
Every year this student joke is remembered by students with a 'cantus' (an evening with drinking beer and singing traditional songs).

I should write an article about the whole attack 🤔

Now ontopic again: Great article with some nice pictures! :D