Karl Brendel is the pseudonym of Karl Genzel (21 March 1871 – 21 August 1925), a schizophrenicoutsider artist and one of the "schizophrenic masters" profiled by Hans Prinzhorn in his field-defining work ''Artistry of the Mentally Ill'' (1923, in German; English edition 1972). He was the only sculptor profiled in Prinzhorn's work, and the work also includes more illustrations of his work (twenty-four sculptures and eight drawings) than that of any other profiled artist.
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