Ad marginem. Ad margin by Paul Klee.

Paul Klee
Ad margin, 1930, 210 (E 10) / 1935–1936
Watercolor and pen on varnish primer on cardboard

Kunstmuseum Basel, legacy of Dr. hc Richard Doetsch-Benziger, Basel 1960inventory G1960.32

"The picture has often been interpreted as Klee's attempt to depict the overcoming of the metaphysical boundary. So Franciscono 1991, pp. 190–191: "painted in 1930 and reworked in 1935 and 1936. ... Along the edges of the painting is a meticulously rendered comic microcosm of plants, animals, geometric forms, and even alphabet letters (as usual in Klee's work, figures not very substantial in themselves).They point inward towards a smouldering sun whose dark radiation is their source of life, but to which they have no other access.Their crowded existence is led at the margin of things, where a subtle geometry binds everything to everything else.
If 'Ad Marginem' was in fact intended to make a distinction between terrestrial existence and a transcendent realm (and it is not at all clear that it was), it is an exception in Klee's work." This aspect is emphasized even more strongly by the exhibition. - Cat. Berlin 2008, p. 88 (Christina Thomson): "In 'Ad marginem' the red circle appears as such a life-giving power center of earthly existence, but at the same time also symbolizes the spatial and metaphysical vastness of the universe."