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Castor of Apt
bishop of Apt
SaintResearchedAncient RomePre-congregation
Feast: 21 September (not on the universal Roman calendar; kept in the Roman Martyrology or local calendars)
Born
350
Died
426
Beatified
—
not needed: before formal processes
Canonised
By tradition
recognised before formal processes began
Who they were
At Apt in Provence, in France, Saint Castor, bishop, who, wishing to explain the monastic life to the brothers of a newly founded monastery, asked Saint John Cassian to compose the celebrated “Conferences” on the ascetics of Egypt.
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 21 September as the bishop of Apt who asked John Cassian to write the Conferences for a new monastery.
Connected on this site
- John Cassian Saint“At Apt in Provence, in France, Saint Castor, bishop, who, wishing to explain the monastic life to the brothers of a newly founded monastery, asked Saint John Cassian to compose the celebrated “Conferences” on the ascetics of Egypt.” — this site's research
- Leontius of Fréjus Saint“Leontius, probably from Nîmes and brother of St Castor of Apt, became Bishop of Fréjus early in the fifth century.” — this site's research
Sources
- Roman Martyrology, 21 September (Italian Bishops' Conference, Santo del giorno)
- Wikidata Q974960 — dates, feast day and identifiers (CC0)
- English Wikipedia — Castor of Apt (CC BY-SA)
Checked against the sources listed on 22 September 2026. Corrections welcome.