A layman martyred at Caesarea Maritima in 310 alongside four companions during the final years of the Roman persecution under Galerius.

Saint Isaiah of Caesarea in Palaestina was a layman martyred on February 16, 310, at Caesarea Maritima, the Roman provincial capital of Palestine, together with four companions named in the tradition as Elias, Jeremiah, Samuel, and Daniel of Caesarea. Their shared names, echoing several of the Old Testament prophets, and their common martyrdom in the same city and year, place them among the many Palestinian Christians executed in the closing phase of the Great Persecution, an episode recorded in some detail by the church historian Eusebius of Caesarea, who was himself a resident of that city at the time.

Quick Facts

• Died: February 16, 310
• Place: Caesarea Maritima, Palestine
• Venerated as: Lay martyr
• Companions: Saints Elias, Jeremiah, Samuel, and Daniel of Caesarea

Who Was Saint Isaiah of Caesarea in Palaestina?

Isaiah died at Caesarea Maritima, the administrative capital of Roman Palestine and home to the church historian Eusebius, whose own eyewitness account of the persecution in this province, the Martyrs of Palestine, provides one of the more detailed contemporary records of Christian suffering under Galerius’s continuation of Diocletian’s edicts. Isaiah is recorded as having died together with four companions bearing the names of major and minor Old Testament prophets, on February 16, 310, near the very end of the persecution, which would be formally ended by the Edict of Milan just three years later.

Historical Setting

By 310, the persecution had entered its final, exhausted phase, with the emperor Galerius himself issuing an edict of toleration the following year shortly before his death, so martyrdoms at this late date carried a particular poignancy, coming as they did so close to the persecution’s end. Eusebius’s detailed local chronicle of the Palestinian martyrs, which likely preserves the memory of Isaiah and his companions, remains one of the most valuable surviving sources for understanding how these final persecutions actually unfolded on the ground.

Why the Church Remembers Saint Isaiah of Caesarea in Palaestina

The Church remembers Isaiah and his four companions as part of the well-documented company of Palestinian martyrs whose deaths, recorded by an eyewitness historian, give modern readers unusually reliable insight into the courage and the cost borne by ordinary lay Christians in the last years before the Church’s legal toleration.

Canonization and Feast Day

No formal canonisation process for Saint Isaiah of Caesarea is recorded; his veneration is ancient, resting on the near-contemporary record of Eusebius of Caesarea and the Church’s continuous liturgical memory of the Palestinian martyrs.

What Catholics Can Learn Today

Isaiah’s death so close to the end of the persecution is a sobering reminder that faithfulness does not become less costly simply because relief is near; his witness, and that of his companions, calls believers to persevere to the very end, whatever the circumstances.

A Prayer to Saint Isaiah of Caesarea in Palaestina

Saint Isaiah of Caesarea, martyr who remained faithful even as persecution neared its end, help us to persevere in faith to our last breath, trusting always in God’s mercy and timing. Amen.

Sources

• Eusebius of Caesarea, The Martyrs of Palestine
• Roman Martyrology