Hans Hollein (1934–2014), top right: hypothetical intervention in Copenhagen, 1969. Reproduced in the catalogue for ‘Hans Hollein: Everything is Architecture’ at the Städtisches Museum, Mönchengladbach 27 May – 5 July 1970. DMC 3316.1.Superstudio (1966–1978), ‘Flooding in dry ice’, Graz, Austria, 1971. Print, 200 × 100 mm. DMC 2156.9.