Justin the Confessor lived in the city of Rome at the time of the persecution of Christians in the Roman Empire.

According to tradition, Justin baptized the widow Tryphonia of Rome and her daughter Cyrilla and, together with Crescentianus, buried the bodies of many martyrs, including those of Pope Sixtus II, Laurentius, Hippolytus, and Romanus of Rome, as well as many other saints in the Catacomb of Cyriaca on the Via Tiburtina - where the church of San Lorenzo fuori le Mura stands today.

[2] Justin conducted the funerals of murdered Christians with the participation of the Church of Rome, for example, on the Via Salaria.

Since the Benedictines there were fellow caretakers of the old parish church of Wilmundsheim, which stood on what is today the graveyard lands, Saint Justin was venerated in Alzenau.

The feast day of Saint Justin is celebrated in the Roman Catholic Church on 4 August.