Artist Paul Signac steps out of the shadow of his celebrated colleague, pointillist Georges Seurat, to star in a new exhibition at the Met. The French painter Paul Signac would spend many years of his long, prolific career preaching, practicing and elaborating the theories of art that he and his friend and mentor Georges Seurat had championed together before the latter's death in 1891. He became known, in fact, as Seurat's Saint Paul. According to Susan Alyson Stein, associate curator of European paintings at New York's Metropolitan Museum of Art, scholars have looked on Seurat as the genius and Signac as the promoter. "In Pointillism," she says, "there was Seurat and that other guy, Signac." On view at the Met from October 9 through December 30, "Signac 1863-1935: Master Neo-Impressionist"—the first major retrospective of Signac's work in nearly 40 years—brings the artist out of the shadows and into the spotlight, firmly establishing him as a major artist in his own right...