Untitled (Kate #18) by Chuck Close. Chuck Close/Courtesy of Pace/MacGill Gallery, New York hide caption

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Anthony Strong. Thibault Stipal/Courtesy of the artist hide caption

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Robert Henri's 1913 Figure in Motion was a realistic, but bold response to Matisse's and Duchamp's nudes. Terra Foundation for American Art, Chicago, Ill. hide caption

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J.D. Salinger wrote nine letters and postcards to aspiring Canadian writer Marjorie Sheard. Graham Haber/The Morgan Library & Museum hide caption

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Marville made more than 425 photographs of the narrow streets and crumbling buildings of premodern Paris, including this view from the top of Rue Champlain in 1877-1878. Charles Marville/Musee Carnavalet/Roger-Viollet hide caption

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Laziz Hamani

Zelda Sayre and F. Scott Fitzgerald pose for a photo at the Sayre home in Montgomery, Ala., in 1919, the year before they married. Bettmann/Corbis hide caption

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An American soldier reads a letter from home, while taking a break from repairing a tank tread in Lang Vei, Vietnam, in March 1971. David Burnett/Contact Press Images hide caption

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Carnegie ultimately gave away $60 million to fund a system of 1,689 public libraries across the country. "In bestowing charity the main consideration should be to help those who help themselves," he wrote. AFP/AFP/Getty Images hide caption

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Nearly 100 years after Edouard Manet painted his scandalous 1863 Olympia, Tom Wesselmann created The Great American Nude #26. Estate of Tom Wesselmann/Licensed by VAGA, New York, NY hide caption

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In this 2007 Ellsworth Kelly piece, four separate oil-painted canvases combine to form a single work, Green Blue Black Red. Jerry L. Thompson/Courtesy of Ellsworth Kelly hide caption

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