In het kader van de manifestatie C’70, Rotterdam (andere deelnemende kunstenaars oa Marcel Broodthaers, Marinus Boezem)
Fotocollage, collectie Museum Boijmans-van Beuningen
1970 Uitgegeven als ansichtkaart (RKS)
2010 Heruitgave ansichtkaart door Museum Rotterdam
Adrian Henri in Total Art. Environments, happenings and performance, p 84-85:
‘Holland seems to be a natural home for environmental art. Dutch artists are revolutionary in all senses of the word. […] Jan Dibbets, Ger van Elk and Marinus Boezem; but the most interesting Dutch work has a distinctly less ‘ivory tower’ approach, as seen for instance in Wim Gijzen’s idea of transforming a new city plaza in Rotterdam into traditional Dutch green fields.’