I remember this smart allegory (I don't know where from) to describe post-modern architecture : "A classic/traditional window is vertical, bescause that's the way you can make the biggest bhole/b in a wall without having it collapse ... I've already talked about this interesting swedish practice with their Tree bHotel/b. In their very last project, bVästra/b Kajen, you can notice the space left between the exterior façade and the interior one, similar to the system used by Pezo ...