Wikipedia text about the Saint
A monk of Gaza, he travelled to the city of Alexandria at the age of sixty. His legend states that after obtaining the name and address of every prostitute in the city, he hired himself out as a day laborer, and took his wage to one of these women at the end of the day. He then would teach her about her dignity and value as a woman and that she did not deserve to be used by men as an object of their lust.
This practice was condoned by the Church, and many prostitutes in the city abandoned their profession and became good wives and mothers.
Death and veneration
Vitalis was killed when a man, misunderstanding the nature of the monk’s visit to a brothel, struck him on the head. Vitalis managed to return to his hut where he died. Apparently during his burial, former prostitutes came out to explain his works before processing with candles and lanterns as his body was brought to the grave.
In the Eastern calendar, his feast day occurs on January 11 and April 22, while the Catholic Church only celebrates his feast on January 11.