Large lithograph by Wolfgang Petrick,circa 1970.(From Wiki):"Wolfgang Petrick (born 12 January 1939, Berlin, Germany) is a German artist.From 1958 to 1965 Petrick completed a course of studies in biology at the Freie Universität Berlin and in art at the Hochschule der Künste (HdK) as a master scholar with Werner Volkert. From 1975 to 2007 he was a professor at the HdK, and he has been a member of the Academy of Arts, Berlin in Berlin since 1993. He lives and works in Berlin and, since 1994, has also been working in New York.Together with Karl Horst Hödicke, Markus Lüpertz, Peter Sorge and others, Petrick founded in 1965 in Berlin the exhibition association "Großgörschen 35", Germany's first self-help gallery (a producers' gallery in the present day sense). Years later as a "Kritischer Realist" he belonged to the group "Aspekt".His initial creative work primarily concentrated on painting, drawing, sculpture, and graphic arts and prints. Since 2000 he has also worked in photography. He has been designing books since 2003 and has so far worked in collaboration with the authors Hans Christoph Buch (Morovia, Mon Amour) and Bora Ćosić (Alaska). For an overview of contemporary art in Berlin see "BERLINART 1961 - 1987", Exhibition catalogue, The Museum of Modern Art, New York, 1987. Stationen der Moderne - Die bedeutenden Kunstausstellungen des 20. Jahrhunderts in Deutschland", Exhibition catalogue, Berlinische Galerie, Berlin, 1988. Karin Thomas Kunst in Deutschland seit 1945, Cologne, 2002. Mariannenpresse, Berlin, 2002. Literaturhaus, Berlin, 2008.WorksWorks 1962-1979, Zeichnungen, Bilder, Objekte, Druckgraphik. Exhibition Catalog, Neuer Berliner Kunstverein, Berlin 1979.1962-1989: Sprung durch die Sonne. Exhibition Catalog, Esslingen (Villa Merkel), Hamburg, Hamburger Kunsthalle, 1989, ISBN 3-923717-54-7.Narziss. Exhibition Catalog, Raab-Galerie. Berlin 1995, ISBN 3-926639-30-X.Malerei und Material. Exhibition Catalog, Haus am Lützowplatz, Berlin 1999.Batteria-GlasBau-Raum-Objekt-Drawing. Exhibition Catalog, Akademie der Künste, Berlin 2000.Deep-Action. Wolfgang Petrick and Meisterschüler. Exhibition Catalog, Georg Kolbe Museum, Berlin 2005.Good Slave-Bad Master. Exhibition Catalog, Galerie Michael Schultz, Berlin 2006.Mutatio. Exhibitions Catalog, Sara Asperger Gallery, Berlin 2008Provenance: From the now closed restoration studio of Orrin Riley and Suzanne Schnitzer.Orrin Riley was a world famous art restorer, who founded the conservation department at the Guggenheim Museum and ran it for 20 years.After leaving the Guggenheim, he opened a restoration business in the West 30's in NYC, and ran it until his death in 1986.Riley's girlfriend and business partner, Susanne Schnitzer, continued the studio until her untimely death from an automobile accident in 2007.From 2007 to 2017 the executors worked with the Attorney General for the State of New York, clearing title for all the works in the restoration business, so they could be sold. David Killen Gallery purchased the contents of the restoration studio, some 200 works of art, that were left behind that could not find owners. David Killen Gallery will be selling the 200 works over the next few years and they range from minor works of art to important pieces. The executors ,along with an archivist, made a catalogue of the abandoned items, and a page corresponding to the work being sold will be included with every Orrin Riley lot sold at this auction house. Lithograph:41.5"x 63" in a frame:43"x 65".