For now, I’ll try to fill in the blanks:
Two shapes in tandem make a rhythm. If each is a projection of the other, together they imply a shifting cubic form that can be approached from above and/or below. I’m told this illusion is called a Necker cube (after the Swiss crystallographer Louis Albert Necker), and like a Rorschach, is an ambiguous image that can only exist on paper. I envision it as a container for surplus—things of ambiguous value.
From the street, the house that used to be Waldhausenstrasse 5 looks just as innocuous as the cube. The occupant was a painter who nailed his pictures together.