|Paul Klee at work in Weimar, 1924. Photograph: Felix Klee/Klee Nachlassverwaltung, Bern|
As he got older, life became harder. In 1933, the Nazis declared his work “degenerate” and he was forced to return to Switzerland. His colours disintegrate, like his health was disintegrating. The paintings become a lot more abrasive: bolder lines, darker shapes.