Jacob Polak was deported to Auschwitz in 1943. Probably because of his ‘Jewish appearance’ he was selected for an anthropological inquiry. Together with 85 other prisoners he was brought to Natzweiler where he has been murdered ‘for scientific purposes’. The bodies were meant for an intended anatomical museum at the Straatsburg university. To the end of the war all the evidence of this experiment was destroyed.
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For further information on Jacob Polak and his relation to camp Natzweiler, see:
Hans-Joachim Lang, Die Namen der Nummern. Wie es gelang, die 86 Opfer eines NS-Verbrechens zu identifizieren (Hamburg, 2004).
See also his biography on the website about the victims of camp Natzweiler.