Muriel and Philip Berman Curator of Modern Art at the Philadelphia Museum of Art.  Recent Exhibitions include “Picasso and the Avant-Garde in Paris” (2010); “Marcel Duchamp: Etant donnes” (2008), for which the catalog was awarded the George Wittenborn Prize for outstanding research and scholarship; “Arshile Gorky: A Retrospective” (2009); “Salvador Dali: The Centennial Retrospective” (2005); and “Giorgio de Chirico and the Myth of Ariadne” (2002).