
According to legend, she was the daughter of the governor of Alexandria and became Christian on having seen a vision of the Virgin and Child. When persecutions in the reign of Maxentius (306-312) increased, she is said to have rebuked him personally over it, arguing for Christianity. He summoned the fifty best philosophers and orators in the empire to refute her, but she out-argued them all, and several of her interlocutors became Christian. She was then scourged severely and imprisoned, but when she refused to convert, Maxentius tried the carrot and offered to marry her if she would convert; she refused again. She was ordered to be executed, so they stretched her across a wheel to break her bones with hammers, but on the first hammer-stroke, the wheel itself broke. Depending on the legend, either she was then beheaded, or they attempted to burn her to death and, when she did not burn, pierced her with a spear.

She has historically been among the most popular saints, and because she was the patron saint of both philosophers and maidens, her image and name are found everywhere throughout the Middle Ages and Renaissance.