The Viennese Museum of Applied Art is a typical example of Ringstrasse architecture: an elegant, richly ornamented Neo-Renaissance building with an inner peristyle hall and galleries. Upon entering the building, the visitor finds himself/herself, surprisingly, in a darkened, curved space: soon he/she discovers that he/she is standing under large, slanted scaffolding. He/she instinctively walks to the right, where there is a way out. When he/she returns to the daylight, he/she finds himself/herself in the Museum hall, standing next to a thirteen-meter high tilted wall covered in red silica sand. The wall slices the inner space of the Museum diagonally across two floors, slashing razor-like through pillars and balustrades up to the ceiling. The wall, tilted at a 45° angle and with a base thirty-five meters long, is a fragment of one side of a pyramid which could continue in the exterior of the Museum building.