mega-structures. Exhibitions One man shows Since 1981: "Interventions" in public space, Antwerp, Barcelona, Canary Islands, Duisburg (Belgium), Spain, Germany. 1985: "Interventiones", Fundación Miró, Barcelona; Espacio P, Madrid, Spain (catalog). 1986: Wilhelm-Lehmbruck-Museum, Duisburg, Germany (catalog). 1987: Heidelberger Kunstverein, Germany (catalog). 1988: February: John Gibson Gallery, New York City, US. Mercer Union, Toronto, Canada. John Gibson Gallery, September, New York City, US. 1989: Barbara Farber Gallery, Amsterdam, the Netherlands. Neue Nationalgalerie Berlin, Germany (catalog). Karl Bornstein Gallery, Santa Monica, California, US. 1990: Galerie Le Gall-Peyroulet, Paris, France. John Gibson Gallery, New York City, US. 1991: Kunstraum Wuppertal, Germany. Galerie Gilles Peyroulet, Paris, France. 1993: Kunsthal Rotterdam, the Netherlands (catalog). Sala 1, Rome, Italy (catalog). Galerie Blancpain-Stepczynski, Geneva, Switzerland. 1995: Interventionen II, VERBAU, Sprengel Museum Hannover, Germany (catalog). PLANEN, Kunstverein Heilbronn, Germany (catalog). 1998: Fundamental wie Bilateral, Kunsthalle Mannheim, CD-ROM for PC, Germany. 2000: Satellites, Galerie Bochynek, Düsseldorf, Germany. Interventions, John Gibson Gallery, New York City, US. 2002: "Analog Discs", Galerie Bochynek, Düsseldorf, Germany. 2004: Okkupanten, Künstlerhaus Bregenz, Palais Thurn und Taxis, Austria. Interventionen und Tekko-Tische, Chiara Marzi Gallery, Berlin 2005: Galerie AT, Barriere, Poznan, Poland 2006: Galerie der Stadt Backnang (catalog), Germany 2007: Stadtgalerie Saarbrücken, (catalog), Germany 2009: Additive, Kunstverein Ingolstadt, CD-ROM-archive with booklet in softbox, Germany 2010: Humboldt-University Berlin, Thaer-Saal, Berlin, Germany 2011: Stump stools, Lichthof im Albertinum Dresden, Dresden, Germany 2012: Dingsda, Saarland Museum, Saarbrücken, Germany 2014: Chisme-Heavy Duty, TEA Tenerife Espacio de las Artes, Santa Cruz de Tenerife, Spain Group shows 1987: Bremer Kunstpreis 1987, Kunsthalle Bremen, Germany, (catalog). documenta, documenta 8, Kassel, Germany, (catalog). 1988: European sculpture made in USA, John Gibson Gallery, New York City, US (catalog). BRD abstract tendencies in new German art, Karl Bornstein Gallery, St. Monica, California, US. Spaces 88, Museo d'arte contemporanea Prato, Italy (catalog). New Poverty, MeyersBloom Gallery, Santa Monica, California, US. 1989: Intuition, John Gibson Gallery, New York City, US. 1990: Three German Sculptors, Bosslet, Robbe, Staehle, Anthony Ralph Gallery, New York, US. Trans-Europe-Express, John Gibson Gallery, New York City, US. Non-Sculpture, Barbara Farber Gallery, Amsterdam, the Netherlands. The Collection 1988-90, Museo d'arte contemporanea Prato, Italy (catalog). 1991: Eurocard, John Gibson Gallery, New York City, US. 1992: 30th anniversary of Amnesty International, Hótel des arts, Paris, France (catalog). Kunst werkt (Art works), Peter Stuyvesant Foundation, Stedelijk Museum Amsterdam, Foundación Miró, Barcelona, Palacio de la Lonja, Zaragoza, Spain (catalog). The 1980s, John Gibson Gallery, New York City, US. Humpty Dumty's Kaleidoscope: A