Col-Art-painting Zürich-Biel-Bienne-Milano 1969/ 70 Concept: M.Kuhn130 / 270 cm Acrylic /canvasParticipants: -Lis Kocher, -Cécile Etter, -Albert Willen, -Manfred Hölzel, -Sohan Qadri, -Mahirwan Mamtani, -Dolores Wyss, -Sherif al Sheroufi, -Albert Longoni. -Marc Kuhn.
Col-Art-painting Milano 1969 Concept: M.Kuhn60 / 130 cm Acrylic / canvasParticipants: -Alberto Longoni, -G.Fini, -Nanette Libis, -Marc Kuhn
Col-Art-painting Biel-Bienne 1969 Concept: M.Kuhn140 / 140 cm Acrylic & Oil / canvasParticipants: -Heinz-Peter Kohler, -Sylvie Neuhaus, -Lis Kocher, -Rolf Spinnler, -Marc Kuhn.
Col-Art-painting Basel 1969 Concept: M.Kuhn90 / 140 cm Acrylic / canvasParticipants: -Peter Bär, -Dolores Wyss, -Esther Gruber, -Werner Thaler, Markus Kaufmann, -Marc Kuhn.
Col-Art-painting Basel 1969 Concept: M.Kuhn90 / 140 cm Acrylic /canvasParticipants: -Esther Gruber, -Kurt Fahrner, -Peter Bär, Marc Kuhn
Col-Art –painting Zürich 1969 Col-Art –painting Zürich 1969Concept: Marc Kuhn & Richard P. Lohse210 / 140 cm Acrylic /canvasParticipants: -Hugo Schuhmacher, -Werner W.Wyss, -Rosina Kuhn, -René Myrha, -Richard P. Lohse, -Marc Kuhn