When was the Italian serial killer which Black Journal was based on the real life events of born 
Black Journal:  It is based on the real life events of Leonarda Cianciulli, the Italian serial killer best known as the "Soap-Maker of Correggio". Leonarda Cianciulli: Leonarda Cianciulli (14 November 1893 – 15 October 1970) was an Italian serial killer.
14 November 1893