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On the rainy night of May 10, 1933, a chaotic procession of Nazi students, SA stormtroopers, and SS guards marched into the Opernplatz in Berlin. Illuminated by floodlights and accompanied by brass bands playing patriotic anthems, they gathered around a massive pyre. Into the flames, they hurled some 20,000 books and manuscripts, designated as undeutsch (un-German). While works by Marx, Freud, and Remarque were consumed, a specific fury was directed at the archives looted four days earlier from a grand villa in the Tiergarten district: the library of the Institut für Sexualwissenschaft (Institute for Sexual Research).

