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Ceratus of Grenoble
roman catholic bishop
SaintFull write-upPre-congregation
Feast: 6 June (not on the universal Roman calendar; kept in the Roman Martyrology or local calendars)
Born
400
Died
450
Beatified
—
not needed: before formal processes
Canonised
By tradition
recognised before formal processes began
Who they were
At Grenoble in Burgundy, in France, Saint Ceratus, bishop, who expressed words of gratitude to Pope Saint Leo the Great for having written the letter to Flavian, and kept his flock unharmed by heresy.
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 6 June as a bishop of Grenoble who kept his flock unharmed by heresy.
Sources
- Roman Martyrology, 6 June (Italian Bishops' Conference, Santo del giorno)
- Wikidata Q612919 — dates, feast day and identifiers (CC0)
- English Wikipedia — Ceratus of Grenoble (CC BY-SA)
Checked against the sources listed on 22 September 2026. Corrections welcome.