the United States District Court for the Southern District of New York by Cowles herself, who claimed that the gallery sold another painting, Girl in Mirror (1964) by Roy Lichtenstein, from her collection in 2008–2009 without her consent. In 2018, Steven Tananbaum brought a case to the New York Supreme Court against Gagosian Gallery and the studio of Jeff Koons over their alleged failure to deliver three works by the artist for which he had paid more than $13 million. See also Antwaun Sargent, a director and curator References External links Larry Gagosian and Thomas Ammann to buy Hughes Warhols together Art museums and galleries in Los Angeles Art museums and galleries in Manhattan Contemporary art galleries in the United States Contemporary art galleries in France Contemporary art galleries in London Contemporary art galleries in Italy Art galleries established in 1979 1979 establishments in California