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WASHINGTON (AP) - The first retrospective of Roy Lichtenstein's pop art since his death in 1997 is opening at the National Gallery of Art on a tour that began in Chicago and will travel on to London and Paris next year.

Famous for his dots and cartoons, Lichtenstein leapt to the forefront of pop art, while his career also covered a broad range of subjects and styles. It even included the occasional nod to politics and history.

The show opening Sunday includes Lichtenstein's take on the Oval Office and on two famous pictures of George Washington.

One rarely seen painting is Lichtenstein's 1951 "Washington Crossing the Delaware." Curators say it's his impression of the 1851 history painting by Emanuel Gottlieb Leutze and the absurd imagery of patriotism.