Author: Beate Pittnauer, Chris Stephens, Christa Lichtenstern, Tanja Pirsig-Marshall, Malte Jung, Mark Niehoff, Andrea Witte, Eline van Dijk, Hermann Arnhold, Markus Müller, Uta Caspary. He was one of the first contemporary sculptors to realise his ideas in the public space throughout the world.