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Who was William of Norwich and why was his case significant?

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Antisemitism demonstration in Paris — antisemitism Demonstrators protesting antisemitism during a silent march in Paris. The march commemorated Mireille Knoll, a Jewish woman who had survived the Holocaust and was murdered in her home on March 23, 2018, in what authorities called a hate crime.

William of Norwich was a young English boy whose death in 1144 serves as the earliest recorded instance of the blood libel, a malicious and false antisemitic accusation that Jews ritually murder Christian children to use their blood for religious purposes.12

His case is historically significant because it established a dangerous, enduring trope that was used to incite violence and justify the persecution of Jewish communities for centuries. Following the discovery of William’s body, a local monk named Thomas of Monmouth promoted the site as a place of pilgrimage and propagated the unfounded claim that local Jews had crucified the boy.31

This fabrication ignored the fundamental tenets of Judaism, which explicitly prohibits the consumption of blood. Despite its absurdity, the narrative was revived sporadically throughout the medieval and modern periods, eventually becoming a staple of Nazi propaganda. The blood libel remains a profound example of how fabricated myths have been weaponized to dehumanize Jewish people and fuel systemic hatred.12