Chrysanthus, born to a noble Roman family, was the only son of Polemius, a senator who moved from Alexandria to Rome. He became interested in Christianity after reading the Acts of the Apostles, which led to his conversion. Chrysanthus was baptized by the priest Carpophorus, and upon his conversion, he decided to lead a life of virginity.

Daria, a Vestal Virgin renowned for her intelligence and beauty, was persuaded by Polemius to marry Chrysanthus with the hope that it would divert him from his Christian faith. However, during their union, Daria was converted to Christianity at Chrysanthus’s urging, and they decided to live as a celibate couple, dedicating their lives to preaching Christianity.

Their activities led to the conversion of many Romans, including a tribune named Claudius and his family, which prompted the authorities to intervene. Chrysanthus was arrested, tortured, and thrown into prison, while Daria faced similar fates and was sent to a house of ill repute.

Legend states that while in captivity, Daria was miraculously protected by a lion, which defended her virtue. When Emperor Numerian learned of their refusal to recant their faith, he ordered both to be executed. They were ultimately buried alive in a sandpit along the Via Salaria around the year 284 AD.