Picture: Authors of Menologion of Basil II (circa 985 AC, Constantinople), Byzantine manuscript illuminators[1]: Pantoleon with Georgios, Michael the Younger, Michael of · Public domain · Wikimedia Commons
Autonomus
Martyr and saint
SaintFull write-upPre-congregation
Feast: 12 September (not on the universal Roman calendar; kept in the Roman Martyrology or local calendars)
Born
250
Died
313
Beatified
—
not needed: before formal processes
Canonised
By tradition
recognised before formal processes began
Who they were
In Bithynia, in present-day Turkey, Saint Autonomus, bishop and martyr.
The miracles
There was never a formal cause: he has been honoured as a saint since before the Church's formal processes began.
Why that counted as sanctity
The Roman Martyrology remembers him on 12 September as a bishop and martyr in Bithynia.
Sources
- Roman Martyrology, 12 September (Italian Bishops' Conference, Santo del giorno)
- Wikidata Q4826873 — dates, feast day and identifiers (CC0)
- English Wikipedia — Autonomus (CC BY-SA)
Checked against the sources listed on 22 September 2026. Corrections welcome.