Founders of the Situationist International at Cosio d'Arroscia, Italy, April 1957. From left to right: Guiseppe Pinot Gallizio, Piero Simondo, Elena Verrone, Michele Bernstein, Guy Debord, Asger Jorn, and Walter Olmo.
Conference in Munich, April 1959. From lefto to right: Giors Melanotte, Giuseppe Pinot-Gallizio, Hans-Peter Zimmer, Maurice Wyckaert, Asger Jorn, Gretel Stadler, Helmut Sturm, Heimrad Prem, Armando, Constant, Guy Debord, Har Oudejans.
The SI at the Institute for Contemporary Art, London, 1960. Standing, from left to right: Maurice Wyckaert, Asger Jorn, Jacqueline de Jong, Hans Peter Zimmer, Heimrad Prem, Helmut Sturm, Katja Lindell, and Jorgen Nash. Sitting, from left to right: Attila Kotyani, Guy Atkins, and Laurence Alloway.
Conference of the SI at Goteborg, Sweden, 1961. From left to right: J.V. Martin, Heimrad Prem, Ansgar Elde, Jacqueline de Jong, Guy Debord, Attilla Kotyani, Raoul Vaneigem, Jorgen Nash, Dieter Kunzelmann, and Gretel Stadler.
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