Carsten Höller, Revolving Doors, 2004-2016, Five mirrored three-winged revolving glass doors, aluminum, polypropylene panels, 219 11/16 × 219 11/16 × 89 3/4 inches (558 × 558 × 228 cm). Artwork © Carsten Höller. Photo by Rob McKeever. Courtesy Gagosian