My pilgrimage to the site of Paul Klee's Hammamet with Its Mosque

In this new series, our writers introduce us to a favourite painting.

For almost as long as I can remember I have loved the pictures of Paul Klee (1879-1940). When I was growing up my parents owned a strange little lithograph by him called Phantom Perspective. It shows a wafer-thin man lying asleep in a dormitory of inflowing straight lines.