Mit der rotierenden Schwarzen Sonne und dem Pfeile by Paul Klee, from Musee Granet. Image from Wikipedia, Creative Commons.
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JOURNAL ARTICLE
Jerome Ashmore
The Journal of Aesthetics and Art Criticism, Vol. 35, No. 3 (Spring, 1977), pp. 329-336
...conclusion the center of his thought and his art for the last thirty-five years of his life. But he continually sought con- firmation of his thinking and found it in the history of art,