An obituary card with a portrait of German art dealer Hildebrand Gurlitt (1895-1956), the father of Cornelius Gurlitt, in a folder at the municipal archive in Duesseldorf, Germany. Rolf Vennenbernd/EPA/Landov hide caption

itoggle caption Rolf Vennenbernd/EPA/Landov

The Corcoran Gallery of Art, seen here in 2005, plans a partnership with the National Gallery of Art and George Washington University that would see both its large collection and its iconic building taken over. Karen Bleier/AFP/Getty Images hide caption

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Museum director Alex Rueger (L) and Dutch artist Jeroen Krabbe stand in front of Vincent van Gogh's long-lost Sunset at Montmajour at the Van Gogh Museum in Amsterdam. The 1888 landscape painting from the height of the Dutch master's career had been abandoned for years in a Norwegian attic on the belief that it was a forgery. Lex van Lieshout/AFP/Getty Images hide caption

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A painting by German artist Franz Marc titled Horses in Landscape is projected on a wall during a press conference on the spectacular art find of nearly 1,500 works in Munich, Germany. Officials say they face a long investigation into the hoarded art. Marc Mueller/EPA/Landov hide caption

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Banksy's "Sirens of the Lambs" started its tour of New York City in — naturally — the Meatpacking District. BanksyNY/Youtube hide caption

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Visitors explore Robert Irwin's Scrim Veil--Black Rectangle--Natural Light during its 2013 reprise at the Whitney Museum of American Art. ©Robert Irwin/Photography ©2013 Philipp Scholz Rittermann/Courtesy of the Whitney Museum hide caption

itoggle caption ©Robert Irwin/Photography ©2013 Philipp Scholz Rittermann/Courtesy of the Whitney Museum

More than 200 people have Walking Gallery jackets that tell the story of their experiences with health and the medical system. Maggie Starbard/NPR hide caption

itoggle caption Maggie Starbard/NPR

A visitor walks past an exhibit in the Encyclopedic Palace. Gabriel Bouys/AFP/Getty Images hide caption

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Il Palazzo Enciclopedico: A visitor puzzles over the multitude of choices offered by the the 55th International Art Exhibition of La Biennale di Venezia. It runs from June 1 to November 24, 2013. Marco Secchi/Getty Images hide caption

itoggle caption Marco Secchi/Getty Images