1351February 1351
Königsberg in der Neumark massacre (well-poisoning pogrom)
Königsberg in der Neumark (Chojna), Poland · Poland
Alleged victim: Jewish community of Königsberg in der Neumark
During the Black Death, the Jews of Königsberg in der Neumark (modern Chojna, Poland) were accused of poisoning the town's wells and rivers and spreading the plague. In 1351 (February 1351 per the Virtual Shtetl) the governor — reportedly on the order of Margrave Ludwig of Brandenburg — had the Jews of the town burned. This was a well-poisoning massacre/pogrom, not merely an expulsion; the original record's "expulsion" framing is corrected here. (The Jewish Encyclopedia's brief "Brandenburg" entry says only that "the Jews were driven from Königsberg in 1351," but fuller German-language scholarship documents a burning.)
Outcome
The Jewish community was destroyed: Jews were burned on the accusation of poisoning wells/rivers during the plague (some sources frame the same event as the Jews being driven out).
Why it matters
One of the furthest-northeastern reaches of Black Death-era anti-Jewish violence on the Brandenburg/Neumark frontier, near the Baltic/Hansa zone where 1349–1351 massacres spread eastward. Note: this is Königsberg in der Neumark (Chojna), NOT Königsberg in Prussia (which had no medieval Jewish community).