Great, very nice new photos as well 
20. The Meuse river used to have various branches in Liège. Boulevard d'Avroy, originally an elegant boulevard with a park in the middle, follows the course of one of the biggest, 2016-05-18
20 BE LI Liège-Avroy-Boulevard d'Avroy 69 2016-05-18 (2) by Ruben Alexander, on Flickr
It's a School, athénée Léonie de Waha. WikipediaWhat's the white building with the clock on the left? Looks rather interesting.