Martyr Nazarius of Rome and Milan

Visually confirmed: the image is inscribed "St. Martyr Nazarius".

Martyr Nazarius was born in Rome to a Christian mother, Perpetua, and a pagan father, baptized by Bishop (Pope) Linus, and dedicated himself early to missionary work and aid to persecuted Christians. He traveled to Milan (Mediolanum), where he met the imprisoned twin brothers Gervasius and Protasius — sons of the Roman martyrs Vitalis and Valeria — and supported them spiritually before their execution. Expelled from Milan by pagan authorities, he went to preach in Gaul, where in the city of Cimiez (near modern Nice) he converted and baptized a youth named Celsus, who became his companion. Both survived attempts on their lives (being cast to wild beasts, an attempted drowning), which turned into further conversions of witnesses.

Returning to Milan, Nazarius and Celsus were arrested by order of Nero and beheaded — traditionally grouped together with Gervasius and Protasius as four Milanese martyrs, though their deaths were not simultaneous. Centuries later, St. Ambrose of Milan (4th c.) discovered the relics of Gervasius and Protasius, and separately the relics of Nazarius and Celsus, translating them into Milan's basilicas, with many healings recorded.

His feast is kept on October 14/27.