Original: March 16 -- A massacre and mass-suicide of the Jews of York , England , led by Richard Malebys , result in the deaths of 150 -- 500 Jews in Clifford 's Tower .
Simplified: Events March 16 -- Massacre and mass-suicide of the Jews of York , England prompted by Crusaders and Richard Malebys kill 150 -- 500 Jews in Clifford 's Tower .