Peter Keler, was a student at the Bauhaus in Weimar, Germany. From 1919 to 1923 he studied mural painting with Wassily Kandinsky (eventually he became Kandinsky's assistant). This simple cradle, with its blue circle, yellow triangle, and red square, shows these influences. After 1945, he was a professor at the College of Architecture and Civil Engineering in Weimar (today Bauhaus) for education and exhibition design. Works by Peter Keler are the Bauhaus Museum, and Weimar Bauhaus Archive in Berlin.