From 1921 until 1924 Bauer’s painting evolved from an expressionist to a more lyrical abstract style. The compositions became simpler, less biomorphic, and more elegant and uplifting as compared to the expressionistic work from the war-torn teens. By late 1925 or early 1926 Bauer became completely absorbed with a geometric style that would define the remainder of his career. The period seems to have been launched with the watercolor Allegro (c. 1925) and a group of similarly sized works on paper. Paintings such as Colored Swinging (1935), the four-paneled Tetraptychon series (1926-30), and his Symphony triptych (1930–34) are typical of this period’s geometric forms and vibrant colorful compositions. -Weinstein