Arethas of Caesarea
Byzantine theologian
Who they were
Arethas was born at Patrae in Greece about 860 and studied under Photius. Early in the tenth century he became Archbishop of Caesarea, and he is counted among the most learned theologians of the Greek Church.
He compiled the oldest surviving Greek commentary on the Apocalypse, and manuscripts copied at his order preserved much of the text of the early Christian apologists, as well as works of Plato and other classical authors. The last date known in his life is 932.
The miracles
The Catholic Encyclopedia does not describe any miracles or a formal cause.
Why that counted as sanctity
A learned Greek archbishop who helped preserve the writings of the early Christian apologists.
- Catholic Encyclopedia (1913), via New Advent - Arethas
- Wikidata Q290771 — dates, feast day and identifiers (CC0)
- English Wikipedia — Arethas of Caesarea (CC BY-SA)
Checked against the sources listed on 22 September 2026. Corrections welcome.