Oase No. 7 is a personal oasis protruded from the façade of the Museum Fridericianums during the 1972 Documenta. It’s a transparent sphere with a diameter of 8 metres. A catwalk made of standard tubular steel sections projected through the window from the interior of the building into the transparent sphere. A tubular steel ring was fixed to this footbridge, at a slight distance from the façade. This ring formed the external support for a PVC foil shell that formed a sphere when inflated into shape by an air pump.