The “Kunsthaus Graz” used acrylic glass as well. Nowadays modern architecture prefers more and more acrylics instead of glass. The advantages are clear. The material is lighter, more resistant, more flexible in some ways and after some years you don’t have to exchange the complete material, but you simply work out the surface, so it will look like new.
(Foto from http://www.iaacblog.com/anniegoyal)
