Recognized as a pioneer of the Land Art movement of the 1960s, Michael Heizer (b. 1944) uses his massive, innovative sculptures to shift our understanding of what art can be. Installed in Room 5 of the Pavilions, Collapse, 1967/2016, is a monumental-scale sculpture comprised of fifteen weathering steel beams arranged in—and extending beyond—a box fitted within the surrounding earth. Commissioned for Glenstone, this work is based on a wooden model studying chaos structure that the artist created in 1967. This “outdoor” sculpture is installed within an enclosure open to the elements but accessed only via the Pavilions interior.