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Saint Tadec

SaintFull write-upDate unknown

Feast: 2 December (not on the universal Roman calendar; kept in the Roman Martyrology or local calendars)

Born
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unknown
Died
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unknown
Beatified
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not on record
Canonised
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not on record

Who they were

Tadec, also called Tudec, is a half-legendary saint of Brittany, a monk of the abbey of Landevennec in the sixth century. He is one of the Breton saints who have never been formally recognised by the Catholic Church, and his day is 2 December.

The story told of him is that a lord of Le Faou, still a pagan, broke down the doors of the church at Daoulas where the heads of the monasteries of Cornouaille had gathered. Tadec was killed at the altar as he was saying Mass, and his companion Judulus was beheaded as he fled towards Landevennec; the same account says the murderer was later converted and founded the monastery of Daoulas in reparation.

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

A monk of Landevennec remembered as killed at the altar at Daoulas.

Sources

Checked against the sources listed on 22 September 2026. Corrections welcome.

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