During the summer of 1391, thousands of assailants burst into the vast majority of Jewish neighbourhoods found within the many towns of the Catalan kingdom. Incited by religious hate, and discontent with the king and the noblemen, rioters murdered hundreds of people and forced the rest to convert to Catholicism. These killings and conversions meant the end of a period of coexistence between Jews and Christians that had begun almost a thousand years earlier, as there had been Jews in Catalonia even before someone could name Catalonia itself. The story that we will explain is the history of a community that was condemned to disappear and of a society that has never been the same again.