Background and Episcopate
Phileas came from a distinguished and wealthy family of Thmuis, a city in Lower Egypt within the region known as the Thebaid. Sources describe him as eloquent and learned, and he had held various public offices in his native city before entering the Church. Eusebius of Caesarea distinguishes him by his wealth, high birth, honours, learning, and eloquence.
His conversion to Christianity led to his appointment as Bishop of Thmuis. St. Jerome, in his On Illustrious Men, records that Phileas composed a finely written work in praise of martyrs, and Eusebius credits both Phileas and his companion Philoromus with a manly, courageous, and philosophic mind.
Trial and Martyrdom
During the Diocletianic persecution Phileas was arrested and transported to Alexandria to be tried before the governor Culcianus. At the trial the judge sought to persuade him to offer pagan sacrifice, emphasizing his family obligations and social standing; when questioned directly whether Christ was God, Phileas affirmed Christ's divinity and cited miraculous evidence.
According to the accounts, his wife and relatives, together with counselors and magistrates present, begged him to recant and save his life, but he remained steadfast, declaring his unchangeable resolution to die for Jesus Christ. Alban Butler's account relates that before execution Phileas reaffirmed his willingness, expressing gratitude for becoming co-heir with Christ.
Philoromus, an official who held high imperial office at Alexandria — a tribune and treasurer-general who administered justice daily under a military guard, and who was secretly a Christian — publicly supported Phileas and criticized those attempting to coerce his apostasy. This intervention led to a death sentence for both men, and the two were beheaded by the sword.
The Prison Letter and Sources
Eusebius of Caesarea preserves, in his Ecclesiastical History, extensive excerpts from a letter Phileas wrote from prison in Alexandria to his diocese at Thmuis. In it Phileas described the tortures inflicted on fellow martyrs, who were tied to pillars, their bodies stretched out with engines and torn with iron hooks, and he quoted scripture on the martyrs willingly embracing death for the sake of religion, enduring all kinds of pains because perfect love casts out fear.
The martyrdom is attested through a convergence of sources: Eusebius and St. Jerome among the ancient writers, later accounts by Alban Butler and Nathaniel Lardner, and a narrative of the passion surviving among the papyri of the Chester Beatty Library. Lardner noted scholarly disagreement over the precise date of the martyrdom, which is variously placed around 305–306 or as late as 311–312.
Commemoration
Phileas is commemorated together with the Martyr Philoromus. The Eastern feast falls on February 4 (also recorded as November 26), while the Roman calendar keeps their memory on February 4.