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11 FOR FURTHER INFORMATION POSTWAR & CONTEMPORARY PRINTS & MULTIPLES Silke Stahlschmidt stahlschmidt@kollerauctions.com ONLINE CATALOGUES www.kollerauctions.com Otto Piene (1928–2014). Black Siren. 1957/81/93. Pigments, gouache and soot on board. 102 × 73 cm. Estimate: CHF 15 000/20 000 In 1957, Piene founded the influential post-war move- ment ’Group Zero’ together with Heinz Mack. This ex- perimental group was one of the forerunners of min- imalism and conceptual art. Piene became known for his grid and soot pictures. Banksy (born 1974). Rude Copper. 2002. Screenprint. 27/250. 57 × 42 cm. Estimate: CHF 37 000/55 000 ’T.V. has made going to the theatre seem pointless, photography has pretty much killed painting but graf- fiti has remained gloriously unspoilt by progress’. This is what Banksy has to say about the field that he has decisively shaped for the past two decades. © 2020, ProLitteris, Zurich Roy Lichtenstein (1923–1997). Les Nymphéas. 1993. Woodcut, linocut, screenprint and litho- graph. 70/100. 79 × 102.5 cm. Estimate: CHF 25 000/35 000 Here, Lichtenstein imports Claude Monet’s famous water lily motif into Pop Art. This elaborately produced graphic work combines all the stylistic elements that we associ- ate with Lichtenstein’s work. © Estate of Roy Lichtenstein / 2020, ProLitteris, Zurich © The Andy Warhol Foundation for the Visual Arts, Inc. / 2020, ProLitteris, Zurich Andy Warhol (1928–1987). From: Marilyn Monroe (Marilyn). 1967. Colour screenprint. 91.4 × 91.4 cm. Estimate: CHF 80 000/120 000 This portrait, one of Warhol’s most famous works, was based on a press photograph of Monroe taken in 1953 as an advertisement for the film ’Niagara’ by Gene Korman. Her rise to superstardom began with the leading role in this thriller.