Come out of the Bone Age, darling....1955 Courtesy of the artist and Jack Shainman Gallery, New York hide caption

itoggle caption Courtesy of the artist and Jack Shainman Gallery, New York

Each of the 60 paintings in Jacob Lawrence's Great Migration series is accompanied with a caption. For this panel, he wrote in 1941: "In every town Negroes were leaving by the hundreds to go North and enter into Northern industry." Courtesy of The Phillips Collection hide caption

itoggle caption Courtesy of The Phillips Collection

In The Shame In Venice 2, Kenyan artist Michael Soi protests the makeup of his country's pavilion at the Biennale. Courtesy of Michael Soi hide caption

itoggle caption Courtesy of Michael Soi

The U.S. Postal Service, in conjunction with the Ricco/Maresca Gallery in New York, unveiled five new stamps Thursday depicting the paintings of Mexican artist Martin Ramirez. Ricco-Maresca Gallery hide caption

itoggle caption Ricco-Maresca Gallery

Wong's style focused more on evoking emotion than capturing a photographic reproduction of nature. Tyrus Wong/Courtesy of the Tyrus Wong Family hide caption

itoggle caption Tyrus Wong/Courtesy of the Tyrus Wong Family

The empty frame from which thieves cut Rembrandt's The Storm on the Sea of Galilee remains on display at the Isabella Stewart Gardner Museum in Boston. The painting was one of 13 works stolen from the museum in 1990. Josh Reynolds/AP hide caption

itoggle caption Josh Reynolds/AP

A detail from the north wall of Diego Rivera's Detroit Industry murals shows workers on the automobile assembly line. After Detroit declared bankruptcy, the murals were at risk of being sold. Click here for a larger view. Detroit Institute of Arts hide caption

itoggle caption Detroit Institute of Arts

There was — and still is — debate as to whether Bust Portrait of a Courtesan (circa 1509) really is a Giorgione. Johansen Krause/The Norton Simon Foundation hide caption

itoggle caption Johansen Krause/The Norton Simon Foundation

Edouard Manet's 1873 oil on canvas, The Railway, is on view at the Norton Simon Museum in Los Angeles until March 2. It is on loan from the National Gallery of Art in Washington, D.C. Studio A/Courtesy of Norton Simon Museum hide caption

itoggle caption Studio A/Courtesy of Norton Simon Museum