Printmaker, landscape painter, and cofounder of Der Blaue Reiter ("The Blue Rider"), Franz Marc (1880-1916) left an exceptional legacy in German Expressionism. His work absorbed influences including Paul Gauguin, van Gogh, Picasso, Henri Matisse, and Robert Delaunay to galvanize a new vocabulary of form and color. Especially keen on depictions of animals, Marc's work began emphasizing cubist, semiabstracted shapes; frenetic, whirling compositions;...