Pop: Bing-Bang Landscapes

Manhattan Art Dealer Leo Castelli is one of the biggest boosters of pop art. As if to confound critics who are proclaiming that the boom is already a bust, Castelli in the past fortnight has managed to sell the world's largest pop painting, by James Rosenquist, and exhibited the world's noisiest contempo rary sculpture, by Robert Rauschenberg. What do the two have to do with each other? To hear the artists tell it, both are simply expressions of today's urban landscape.

58-Ft. Woodward. Rosenquist's work, titled F-111, is 85 ft. long by 10...