The Wiener Holocaust Library in London — the world's oldest Holocaust archive — opens an exhibition this week marking 120 years since Alfred Dreyfus's exoneration. The show's thesis is structural, not merely commemorative: the Dreyfus affair was the first antisemitic campaign to exploit industrial-speed media production, and the mechanics of that exploitation remain disturbingly legible today. The raw material is approximately 40 items spanning the decade from 1894 to Dreyfus's exoneration, promotion, and award of the Légion d'honneur. Sources include the library's own Wiener collection, acquisitions made over intervening decades, and a long-term loan from Birkbeck, University of London. Alfred Wiener himself, grandfather to Conservative peer Daniel Finkelstein, fled Germany for the Netherlands in 1933, then to London in 1938, carrying the documentary record of rising European antisemitism with him. The exhibition's most striking artefacts are the Musée des Horreurs posters — 45 to 50 variations published between autumn 1899 and 1900, each depicting a pro-Dreyfus figure as a monstrous animal. Arthur Ranc, a leftwing politician and newspaper editor, appears as an alligator-like creature with razor-sharp teeth. As curator Clara Dijkstra notes, "the point was to dehumanise all these figures that were defending Dreyfus's innocence." The French government eventually shut the series down after roughly a year, deeming them too grotesque — an early example of a state struggling to contain a media campaign it had allowed to flourish. The exhibition also displays a copy of La Libre Parole, the rightwing newspaper founded by Édouard Drumont, who also initiated the Antisemitic League of France. It was La Libre Parole that first publicly reported Dreyfus's alleged guilt, effectively controlling the narrative frame from the outset. The only English-language item in the Wiener collection is a 45-page special edition of the Graphic, a weekly illustrated newspaper, which cast the affair as a courtroom drama under the headline "Dreyfus the martyr" — notable for foregrounding miscarriage of justice rather than antisemitism, and inflected by a distinctly anti-French editorial agenda. The affair's media ecosystem was self-generating. Émile Zola's open letter J'Accuse to President Félix Faure in 1898, accusing the French government of antisemitism and cover-up, triggered a counter-publication titled Psst….! One image from that journal shows a Prussian officer puppeteering a Zola mask with a caricatured Jewish figure behind it — conspiracy layered on conspiracy. Zola was convicted of libel and fled to England. Co-director Barbara Warnock frames the exhibition as a study in media mechanics, not just historical memory. France's recently lifted censorship laws, combined with faster printing presses, created the conditions for what she calls the world's first experience of antisemitism "gone viral." The dehumanisation posters, the partisan newspapers, the conspiracy imagery — none required new ideas, only new distribution speed. That structural observation is the exhibition's real argument, and it is the reason the Wiener Library considers it "a very relevant topic for now." The exhibition, J'accuse! Press, Polemic and the Dreyfus Affair, runs from 5 November to 19 March at the Wiener Holocaust Library in London.