Saint Petronilla
Roman Catholic saint
Feast: 31 May (1962 Missal, commemoration) · not on the current Roman calendar
Who they were
Petronilla was a virgin, probably martyred at Rome at the end of the first century. The early lists of venerated tombs place her grave on the Via Ardeatina beside Sts Nereus and Achilleus, which excavations in the catacomb of Domitilla have confirmed, finding the church built there over their tombs.
A painting from soon after 356 shows her, named 'Petronilla Martyr', welcoming a dead woman into heaven, proof that Rome venerated her as a martyr in the fourth century. Legend later made her a daughter of St Peter.
The miracles
There was never a formal cause: Petronilla has been honoured as a martyr since the fourth century.
Why that counted as sanctity
Petronilla is honoured as one of the earliest virgin martyrs of the Roman Church.
Connected on this site
- Perpetua Saint Parent, Mother
- Saint Peter Saint Parent
- Nereus and Achilleus Saint“The early lists of venerated tombs place her grave on the Via Ardeatina beside Sts Nereus and Achilleus, which excavations in the catacomb of Domitilla have confirmed, finding the church built there over their tombs.” — this site's research
- Catholic Encyclopedia (1913), via New Advent - St. Petronilla
- Wikidata Q463600 — dates, feast day and identifiers (CC0)
- English Wikipedia — Saint Petronilla (CC BY-SA)
Checked against the sources listed on 21 September 2026. Corrections welcome.