Known as a member of the group The Lost Generation, Henning started his career as a photographer and joined the Bauhaus. Here he was influenced by Kandinsky, Schmidt, Mies van der Rohe. In these years he created the Kinder der Strasse – a series of photographs later destroyed by the Nazis. In 1932 Josef Albers encouraged him to move to painting and find his own style. After the war he was one of the founders of the group Bildende Künstler (Visual Artists). Few years later he left the Socialist Unity Party and worked as a concrete worker until 1972, when he decided to dedicate himself exclusively to painting.