“Driftwood City” by Anna and Lawrence Halprin, a workshop from their “Experiments in Environment” series, Sea Ranch, CA, 1966. Courtesy Lawrence Halprin Collection, Architectural Archives, University of Pennsylvania.

Ugo la Pietra demonstrating “Il Commutatore” in Milan, Italy, 1970. Courtesy Archivio Ugo La Pietra, Milan

Artist Corsin Fontana demonstrating Coop Himmelblau’s “Soul Flipper II” at Galerie Stampa in Basel, Switzerland, in 1971. Photo Peter Schnetz

Moore Grover Harper’s “Design-A-Thon”, Dayton, Ohio, in 1976. Courtesy Centerbrook Architects and Planners.

Architect Kazuyo Sejima demonstrating “Pao I: A Dwelling for Tokyo Nomad Women” by Toyo Ito and Associates, 1985, Tokyo, Japan. Photo Tomio Ohashi

Performance view of “The Rotary Notary and His Hot Plate” by Susan Mosakowski, set design by Diller + Scofidio, at La Mama E.T.C. in New York. 1987. Photo J. Vezuzzo. Courtesy Diller Scofidio + Renfro

Christoph Schlingensief and Francis Kéré on the construction site of Opera Village in Laongo, Burkina Faso, in 2009. Courtesy Opendorf Afrika. Photo Aino Laberenz

“Superpowers of Ten” by Andrés Jaque / Office for Political Innovation at the 2013 Lisbon Architecture Triennial. Courtesy Office for Political Innovation

“ReActor” by Alex Schweder and Ward Shelley at Art Omi, Ghent, NY, 2016. Photo Richard Barnes

“L’air pour l’air” by SO–IL in collaboration with Ana Prvački in the Garfield Park Conservatory for the 2017 Chicago Architecture Biennial. Photograph by Laurian Ghinitoiu

“Marching On” by Bryony Roberts and Mabel O. Wilson. Performer Asante Garry from the Marching Cobras of New York City in Marcus Garvey Park, 2017. Photo Jenica Heintzelman