A layman of Corinth martyred in 251 with six companions during the empire-wide Decian persecution, in a church first founded by Saint Paul.

Saint Diodorus of Corinth was a Christian layman of Corinth, Greece, martyred in 251 during the Decian persecution, the first empire-wide Roman campaign to compel sacrifice to the state gods. He died alongside six companions — Victorinus, Victor, Nicephorus, Claudius, Serapion, and Papias — members of the historic Corinthian church first founded by the Apostle Paul. His veneration rests on the ancient local cult preserved through the Church’s liturgical memory.

Quick Facts

• Died: 251 (Corinth, Greece)
• Venerated as: Lay martyr, one of a group of companion martyrs

Who Was Saint Diodorus of Corinth?

Saint Diodorus of Corinth was a Christian layman of Corinth, Greece, martyred in 251 as part of a larger group that included Saints Victorinus, Victor, Nicephorus, Claudius, Serapion, and Papias.

Historical Setting

His death falls within the Decian persecution of 249–251, the first empire-wide Roman effort to compel all subjects to sacrifice to the state gods, which struck the historic Christian community of Corinth — a church founded in the apostolic age by Saint Paul himself — with particular force.

Why the Church Remembers Saint Diodorus of Corinth

He is remembered as part of this group of seven companions, a notably large local martyrdom that suggests a significant Christian community in Corinth was targeted together rather than singled out believer by believer.

Canonization and Feast Day

No formal canonisation process is recorded for Saint Diodorus of Corinth, as is standard for a martyr of this era; his veneration rests on ancient local cult received through the Church’s liturgical memory.

What Catholics Can Learn Today

That so large a group died together in one of Paul’s own founding churches is a sober reminder of how deeply the Decian persecution reached even the most historic and established Christian communities.

A Prayer to Saint Diodorus of Corinth

Saint Diodorus of Corinth, who with your six companions held fast to the faith planted by the Apostle Paul, pray for the perseverance of the Church in every age of trial. Amen.

Sources

• Roman Martyrology