Indeed, the buildings were wrong, and start_date=1587 on a restaurant looks a bit weird → removed the restaurant and moved tags to the building: https://www.openstreetmap.org/way/1282584377

Also, the last picture on this page seems to be the back of that building.
https://vertigobrussels.com/index.php/yourevent/

Do you think the situation on the map is okay now?