Ellsworth Kelly / Robert Ryman / David Smith / Al Taylor / Richard Serra / Sean Scully / Kunsthaus Zürich / Lucio Fontana / Donald Judd / Mario Merz / Brice Marden / Joseph Beuys / Richard Long / Agnes Martin / Hubert Looser / Tony Smith / David Chipperfield / John Chamberlain / Andy Warhol / Cy Twombly / Giuseppe Penone / / /
Position
Björn Quellenberg Head / businessman / artist / representative / Hostess / important abstract artist / /