Editor of the cultural monthly “Du”
Freelance art writer living at Hausen am Albis near Zurich.
Author of numerous works on contempory art and contributor to international magazines (Graphis among others)
Guest lecturer at several universities.
1969-1976 Member of the Swiss Federal Art Commision
Chairman of the Art Commision of the city of Zurich
President of the exhibition Commitee of the Kunsthaus Zurich