SFMOMA made a number of important acquisitions under the direction of David A. Ross (1998–2001), who had been recruited from the Whitney Museum in New York, including works by Ellsworth Kelly, Robert Rauschenberg, René Magritte, and Piet Mondrian, as well as Marcel Duchamp’s iconic "Fountain" (1917/1964). Those and acquisitions of works by Jasper Johns, Mark Rothko, Francis Bacon, Alexander Calder, Chuck Close and Frank Stella put the institution in the top ranks of American museums of modern art. After three years and $140 million building up the collection, Ross resigned when a slow economy forced the museum to keep a tighter rein on its resources.