Concrete spiral staircase twists through an open plan office by Hildebrand

A spiral staircase made of concrete rises through the centre of an open-plan office designed by architecture studio Hildebrand in Steinhausen, Switzerland. Winding its way up the building’s four levels, the staircase ends with a large elliptical skylight that brings light into the centre of each floor. Hildebrand designed the headquarters for Hapimag, a Swiss
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