Film and photography, the theory of relativity and psychoanalysis – at the beginning of the 20th century, academic painting was no longer able to address issues of modern life. The X-ray and microscope had made the inner structures, the elementary building blocks of life visible to the human gaze. Many artists started experimenting with new forms of expression beyond any illusionistic representation of the visible world. Figuration or abstraction – that was the question central to Modern Art. Paul Klee (1879-1940) found his own answers in this matter.