Bruce Nauman, Elliptical Space, 1972

B/w photo by Balthasar Burkhard featuring Nauman's famous Kassel Corridor created for Documenta 5, 17.3 x 12.5 cm. Very good copy.

Added is a newspaper clipping from Der Spiegel 17 sept 1973 mentioning the installation, which comprised of two curved walls and a corridor strictly accessible for only one guest at a time.