06 November 2018, US, New York: A visitor photographs Andy Warhol's picture series by Mao Zedong at the US retrospective of the artist's work in New York's Whitney Museum. The first major US retrospective of the work of the artist Andy Warhol (1928-1987) in around 30 years has been on view there since Monday. Photo: Christina Horsten/dpa

06 November 2018, US, New York: A visitor stands in front of Andy Warhol's work "Campbell's Soup Cans" at the US retrospective of the artist's work in New York's Whitney Museum. The first major US retrospective of the work of the artist Andy Warhol (1928-1987) in around 30 years has been on view there since Monday. Photo: Christina Horsten/dpa

06 November 2018, US, New York: A visitor stands in front of Andy Warhol's work "Mao" in the US retrospective of the artist's work at the Whitney Museum in New York. The first major US retrospective of the work of the artist Andy Warhol (1928-1987) in around 30 years has been on view there since Monday. Photo: Christina Horsten/dpa

06 November 2018, US, New York: A visitor photographs Andy Warhol's work "Orange Car Crash Fourteen Times" at the US retrospective of the artist's work at the Whitney Museum in New York. Photo: Christina Horsten/dpa

06 November 2018, US, New York: A visitor to the US retrospective of the artist's work at the Whitney Museum in New York stands in front of Andy Warhol's artwork "Mao". Photo: Christina Horsten/dpa

06 November 2018, US, New York: A visitor photographs the artist's work at the US retrospective at the Whitney Museum in New York in front of Andy Warhol's artwork "Mao". Photo: Christina Horsten/dpa

06 November 2018, US, New York: At the US retrospective of Andy Warhol's work at the Whitney Museum in New York, a visitor takes a photograph of the artist's self-bid. Photo: Christina Horsten/dpa

06 November 2018, US, New York: At the US retrospective of the artist's work at the Whitney Museum in New York, a visitor stands in front of Andy Warhol's artwork "Marilyn Diptych". Photo: Christina Horsten/dpa

06 November 2018, US, New York: A visitor to the US retrospective of the artist's work at the Whitney Museum in New York stands in front of Andy Warhol's work "Marilyn Diptych". Photo: Christina Horsten/dpa

06 November 2018, US, New York: A visitor to the US retrospective of the artist's work at the Whitney Museum in New York stands in front of Andy Warhol's work "Marilyn Diptych". Photo: Christina Horsten/dpa