Enrichetta Alfieri was an Italian religious sister born in 1891 in Borgo Vercelli who belonged to the Sisters of Divine Charity. She is most widely recognized for her compassionate service to inmates at the San Vittore prison in Milan, where she earned the nicknames "the angel of San Vittore" and "the mother of San Vittore." During the Second World War, she assisted those facing persecution by smuggling messages and supplies. Despite being arrested by Nazi forces on espionage charges, she was released through the intervention of high-ranking church officials.