Adam Matthew Digital (Firm) 8,948 Gotham Book Mart Collection (University of Pennsylvania) 4,976 Metropolitan Museum of Art (New York, N.Y.) 3,757 United States National Aeronautics and Space Administration 3,256 New York (N.Y.) Landmarks Preservation Commission 2,452 Picasso, Pablo, 1881-1973 2,245 De Gruyter 2,224 Rosengarten Family Fund 2,201 Museum of Modern Art (New York, N.Y.) 1,811 ebrary, Inc 1,728 Alumni and Friends Memorial Book Fund 1,655 National Gallery of Art (U.S.) 1,515 Gosudarstvennyĭ Ėrmitazh (Russia) 1,480 Victoria and Albert Museum 1,430 Art Institute of Chicago 1,410 Biennale di Venezia 1,398 Museum of Fine Arts, Boston 1,294 Sotheby's (Firm) 1,263 Arts Council of Great Britain 1,223 Musée du Louvre 1,202 George Clapp Vaillant Book Fund 1,172 Le Corbusier, 1887-1965 1,166 Sallie Bingham Center for Women's History and Culture 1,061 Centre Georges Pompidou 1,047 ProQuest (Firm) 1,020 Leonardo, da Vinci, 1452-1519 1,011 Anne S.K. Brown Military Collection 1,006 Whitney Museum of American Art 994 Rembrandt Harmenszoon van Rijn, 1606-1669 970 Tate Gallery 946 Anne and Joseph Trachtman Memorial Book Fund 927 Royal Academy of Arts (Great Britain) 920 Culture Class Collection (University of Pennsylvania) 892 National Gallery (Great Britain) 863 British Museum 862 Gu gong bo wu yuan (China) 856 Christie, Manson & Woods 838 Los Angeles County Museum of Art 837 Amsterdam (Netherlands) Stedelijk Museum 835 Gogh, Vincent van, 1853-1890 826 Matisse, Henri, 1869-1954 801 Solomon R. Guggenheim Museum 794 Gosudarstvennyĭ russkiĭ muzeĭ (Saint Petersburg, Russia) 784 Philadelphia Museum of Art 780 Dürer, Albrecht, 1471-1528 770 Michelangelo Buonarroti, 1475-1564 770 Museo del Prado 743 Tōkyō Kokuritsu Hakubutsukan 742 Goya, Francisco, 1746-1828 734 Harvard University Graduate School of Design 732 Klee, Paul, 1879-1940 727 Chagall, Marc, 1887-1985 720 Réunion des musées nationaux (France) 709 Musée national d'art moderne (France) 701 Guo li gu gong bo wu yuan 687 Julio Mario Santo Domingo Collection 672 Galeries nationales du Grand Palais (France) 662 Langley Research Center 656 Class of 1924 Book Fund 655 Wright, Frank Lloyd, 1867-1959 653 J. Paul Getty Museum 636 Hamburger Kunsthalle 631 Cramer Silver and Decorative Arts Collection (Brown University) 627 National Gallery of Canada 622 Ruskin, John, 1819-1900 617 Muzeʼon Yiśraʼel (Jerusalem) 615 Cleveland Museum of Art 613 Rijksmuseum (Netherlands) 612 Haags Gemeentemuseum 607 Dutch Culture Class Collection (University of Pennsylvania) 606 Gosudarstvennyĭ Ėrmitazh (Russia) 600 Raphael, 1483-1520 600 Miró, Joan, 1893-1983 592 Warhol, Andy, 1928-1987 573 Museo Nacional Centro de Arte Reina Sofía 572 Beuys, Joseph 569 Obrist, Hans Ulrich 569 Brooklyn Museum 567 Kunsthaus Zürich 566 Marlborough Gallery 565 England and Wales Parliament 564 Rodin, Auguste, 1840-1917 564 Musée d'Orsay 563 Museum of Fine Arts, Houston 560 Adam H. Fetterolf Fund 552 Gosudarstvennai︠a︡ Tretʹi︠a︡kovskai︠a︡ galerei︠a︡ 550 Kandinsky, Wassily, 1866-1944 549 Museum Boymans-Van Beuningen 543 Kennedy Galleries 541 Graphische Sammlung Albertina 539 Gilbert, Shirley, and Marilyn Luber Collection (University of Pennsylvania) 535 Lisa Unger Baskin Collection (David M. Rubenstein Rare Book & Manuscript Library) 531 Class of 1932 Fund 520 Rubens, Peter Paul, 1577-1640 520 Musée du Louvre 517 Detroit Institute of Arts 516 Taylor & Francis eBooks 512 Hayward Gallery 508 Gosudarstvennyĭ russkiĭ muzeĭ (Saint Petersburg, Russia) 507 M. Knoedler & Co 505