Screwarch
Museum Boymans-van Beuningen, Rotterdam, the Netherlands
Aluminum painted with polyurethane enamel
12 ft. 8 in. x 21 ft. 6 in. x 7 ft. 10 in. (3.9 x 6.6 x 2.4 m)
Commissioned November 1978 by the Museum Boymans-van Beuningen
Installed May 1984
Photo: Tom Haartsen