Diodorus of Tarsus
bishop
Who they were
Diodorus, of noble family, probably of Antioch, studied at Athens and became a monk and head of a monastery near Antioch, where St John Chrysostom was his disciple. With Flavian he held out against the Arian bishops and taught the people to sing the Psalms in alternating choirs, a practice that spread through the Church.
Made priest in 361, he wrote against the pagans; the Emperor Julian mocked him for turning Athenian learning against the gods. He died about 392.
The miracles
The Catholic Encyclopedia does not describe how he came to be honoured as a saint.
Why that counted as sanctity
A monk and teacher who stood firm for the faith against Arianism and paganism.
Connected on this site
- John Chrysostom Saint Pupil“Diodorus, of noble family, probably of Antioch, studied at Athens and became a monk and head of a monastery near Antioch, where St John Chrysostom was his disciple.” — this site's research
- Meletius of Antioch Saint Teacher
- Theodore of Mopsuestia Saint Pupil
- Catholic Encyclopedia (1913), via New Advent - Diodorus of Tarsus
- Wikidata Q729492 — dates, feast day and identifiers (CC0)
- English Wikipedia — Diodorus of Tarsus (CC BY-SA)
Checked against the sources listed on 21 September 2026. Corrections welcome.