Craig Kauffman, Le Mur s'en va (The wall goes away), Synthetic polymer on acrylic plastic, 185.4 x 120 x 22.9 centimeters, 1969, Art Institute of Chicago, Illinois
Micheline Beauchemin, Nordic Blue Ice Flow: Homage to the St. Lawrence River, Cotton threads covered with mylar, colored silk threads and linen threads, 162 x 504.5 centimeters, 1984, National Gallery of Canada, Ottawa
Yoko Ono, Eye Blink, 16 millimeter film, black and white, 35 seconds, 1966, Reina Sofia, Madrid / Image credit: Jonas Mekas (Note: Video is hyperlinked via the title of the work).