On the night of Friday 16 March 1190 some 150 Jews and Jewesses of York having sought protection in the Royal Castle on this site from a mob incited by Richard Malebisse and others chose to die at each others hands rather than renounce their faith. יָשִׂימוּ לָּד כָּבוֹד וּתְהִלָּתוֹ בָּאִיִּים Isaiah XLII 12
More background on this event here:
http://www.historyofyork.org.uk/themes/norman/the-1190-massacre
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