English: Photo shows detail of an Anton Heyboer etching published in a poster for the exibition "Anton Heyboer - De Haarlemse Jaren", 2012-2013 Historische Museum Haarlem, The Netherlands, Artwork in private collection, titled "Krankzinnig", or "Crazy".
Deutsch: Foto zeigt Details einer Radierung, abgebildet in einem Poster zur Ausstellung "Anton Heyboer - De Haarlemse Jaren", Historische Museum Haarlem, Niederlande
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