I wonder if the slopes were caused by foot steps. I've always marveled at that since I visited the Capital steps as a small child./// That makes sense, in this picture, as the steps look real and not staged for a "look".
KAIROS / João Quintela + Tim Simon Attention to detail I guess the idea was that the stair can be a part of building skin. For that, the architect made new type of stair. Actually the stair does not exist itself.