Davy Crockett represented Tennessee for three terms in Congress before moving to Texas and fighting in the Battle of the Alamo. AP hide caption

itoggle caption AP

An undated photo from the exhibit shows Southern Christian Leadership Conference officials leading demonstrators in a march "against fear and injustice" in Decatur, Ga. SCLC records, MARBL, Emory University hide caption

itoggle caption SCLC records, MARBL, Emory University

A young demonstrator is attacked by a police dog in Birmingham, Ala., in May 1963. Scenes like these helped usher in the nation's landmark civil rights law, the 1965 Voting Rights Act. The Supreme Court will hear arguments Wednesday over a key provision of the law. Bill Hudson/AP hide caption

itoggle caption Bill Hudson/AP

WBT radio's bomb shelter in Charlotte, N.C., part of a government-funded emergency communications network, as it looked in 1963. Courtesy of Jerry Dowd hide caption

itoggle caption Courtesy of Jerry Dowd

Stargazy Pie, a cornish dish named for the way the fish heads poke through the crust towards the sky. Courtesy of Sandy Levins hide caption

itoggle caption Courtesy of Sandy Levins

Marcel Duchamp's Cubist-inspired Nude Descending a Staircase was famously described by one critic as "an explosion in a shingle factory." Philadelphia Museum of Art/Copyright succession Marcel Duchamp / ADAGP, Paris / Artists Rights Society (ARS), New York 2013 hide caption

itoggle caption Philadelphia Museum of Art/Copyright succession Marcel Duchamp / ADAGP, Paris / Artists Rights Society (ARS), New York 2013