In 1926, Wassily Kandinsky’s Point and Line to Plane was published. The book explores the expressive power of geometric elements as the building blocks of visual harmony. “Color is the keyboard, the eyes are the harmony, the soul is the piano with many strings,” Kandinsky wrote. “The artist is the hand which plays, touching one key or another, to cause vibrations in the soul.” In the mid–1920s, Kandinsky was teaching at the Bauhaus and had perfected his boldly colored abstract paintings, filled with circles, half-circles, curves, and strong straight lines. This exhibition in Potsdam showcases those paintings alongside the works of 70 other artists whom he influenced—among them, Agnes Martin, Piet Mondrian, and Barbara Hepworth. —Elena Clavarino