Four large steel frames, each tracing the contours of a quasi brick – a geometry that recurs often in Eliasson’s work – are stacked in contrary directions on top of one another. The quasi brick draws from the geometer Einar Thorsteinn’s research on naturally occurring quasicrystals that exhibit both four- and fivefold symmetry. The shape, a twelve-sided solid made of parallelograms and hexagons, is a space-filling polyhedron – identical copies can be arranged together to ‘pack’ space, leaving no space between the individual members. Its combination of regular and irregular faces suggests an organic growth, but its geometric dimensions have been precisely tuned to achieve its unique properties.