Martyr Mammius of Corfu

Martyr Mammius is one of the "Seven Robbers of Corfu," former brigands held in a prison on the island of Kerkyra (Corfu). The Apostles of the Seventy Jason and Sosipater (companions of the Apostle Paul — Rom. 16:21, Acts 17:5-9), who were also imprisoned there, converted the robbers to Christ together with the jailer Anthony.

For openly confessing the Christian faith, all seven — Saturninus, Iakischolos, Faustian, Ianuarius, Marsalius, Euphrasius, and Mammius — were subjected to an agonizing execution: boiled alive in a cauldron of pitch, sulfur, and wax. They suffered together with the Apostles Jason and Sosipater and the virgin-martyr Kerkyra.

The feast is kept on April 28/May 11. Sources disagree on the exact dating of the feat: some place it in the apostolic era (c. 63 AD, matching the lifetime of Jason and Sosipater themselves), others in the 2nd century; given this discrepancy, the more cautious general dating "1st-2nd centuries" has been adopted.

HONEST NOTE ON THE IMAGE'S LOCATION: the surviving image — a fresco in the Church of St. Barbara at Latzianá, Kissamos, on the island of Crete (2nd half of the 11th c.) — is not evidence of a toponymic error ("of Corfu" rather than "of Crete"): Byzantine churches regularly painted menologion cycles depicting saints of the entire liturgical year, not only locally venerated ones, so a Corfiot martyr's image in a Cretan church is standard practice, not a sign of identification confusion.