[Duisburg, Germany; May 20. Image via Getty]

A visitor takes pictures of the work 'Kuh' (Cow) from the year 1964 by German artist Gerhard Richter during a preview of the exhibition 'Paintings from Private Collections' on May 20, 2009 at the Museum Kueppersmuehle in Duisburg, western Germany. The exhibition presented from May 21 to August 23, 2009 features some 80 paintings which originated in the years from 1963 to 2007, and comprises some of the artist�s key works. Gerhard Richter is one of Germany's most important and influential artists. AFP PHOTO DDP/VOLKER HARTMANN GERMANY OUT (Photo credit should read VOLKER HARTMANN/AFP/Getty Images)