The life of St Caesarius
He settled afterward in Constantinople, where his skill as a physician earned him such a name that the emperor Constantius wished to make him his own personal doctor.
When Julian, later called the Apostate, came to power in 361, he summoned Caesarius to serve as his own physician and worked to draw him back toward the old gods. Caesarius, valuing his faith above whatever favor an emperor could offer, in time left the court and returned to Constantinople after Julian's death in 363. Under the emperors Valentinian and Valens he went on to serve as quaestor, overseeing public funds, at Nicaea in Bithynia.
There, on October 11, 368, he survived a violent earthquake that killed many around him. Shaken by his escape, he was baptized at last, a sacrament he had deferred as many Christians of his day did, gave his wealth to the poor, and died soon after, in the plague that followed the earthquake, either late that year or early in 369.
He is remembered as a physician who served under four emperors without setting aside his faith, and whose life closed only after that faith had, at the very end, been sealed in baptism.

