Alfred Waldenburg was a phrenologist. He was a regular visitor to Het Honk, the precursor of the artist society De Kring at the Reguliersdwarsstraat in Amsterdam. There he frequently met with the poet Jacques Rensburg.
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In 1909 Piet Mondriaan posed for Alfred Waldenburg.
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See also:
Maurits Dekker, Amsterdam bij gaslicht (Utrecht/Antwerpen 1949) tweede druk, pag. 117 - 128
In February 1942, an obituary was placed in Het Joodsche Weekblad for Alfred Waldenburg.
Het Joodsche Weekblad, 13 February 1942, 7