In 2009, the museum gained a custodial relationship for the contemporary art collection of Doris and Donald Fisher of Gap Inc..[16] The Fisher Collection includes some 1,100 works from artists such as Alexander Calder, Chuck Close, Willem de Kooning, Richard Diebenkorn, Anselm Kiefer, Ellsworth Kelly, Roy Lichtenstein, Brice Marden, Agnes Martin, Gerhard Richter, Richard Serra, Cy Twombly, and Andy Warhol, among many others. The collection will be on loan to SFMOMA for a period of 100 years.[17]