Martyrs Pamphilus the Presbyter, Valens the Deacon, Paul, Porphyrius, Seleucus, Theodoulus, Julian, Samuel, Elias, Daniel, Jeremiah and Isaiah at Cæsarea in Palestine

Pamphilus, a native of Berytus (Beirut) trained in Greek learning, was a presbyter of Caesarea in Palestine, where he built up a famous library and copied and corrected manuscripts of Scripture and of Origen. His friend and pupil Eusebius, who called himself 'Eusebius of Pamphilus', wrote of his martyrdom. Arrested under Diocletian, he spent two years in prison with the deacon Valens and Paul of Jamnia.

On 16 February, c. 309, they were condemned by the governor Firmilian together with five Egyptian brothers who had escorted confessors to the mines of Cilicia and had taken the names of prophets: Elias, Jeremiah, Isaiah, Samuel and Daniel. The young Porphyrius, Pamphilus's servant, Seleucus, the aged servant Theodulus and the Cappadocian Julian died with them.