Quadratus of Corinth was a third-century physician and Christian saint who lived during the persecutions of the Roman Empire. Born in the wilderness to a mother who died shortly after his birth, he was raised in solitude. According to tradition, he was sustained by divine providence throughout his youth. After moving to the city at age twelve, he studied medicine and combined natural remedies with prayer to treat the sick. He eventually faced martyrdom during the reign of Emperor Decius.