>>2799264>hurr durr i don't have any arguments / better suggestions so it must be le r*dditoragain, if you're into architecture Brussels IS the best destination in Belgium
it's not only Art Nouveau, just the one Brussels is the most known and most prominent example for
you'll find representative buildings for
>Art Deco>Neoclassical>Gothic>Neo-Renaissance>Brutalismand of course Modernism (but you don't need any specific city for that)
because it's a wealthy city that build "contemporary" for hundreds of years now
apart from that, many museums with great Art from all epochs