Memmius was a 3rd-century bishop and presbyter who served as the first leader of the diocese in Châlons-sur-Marne, located in Gaul. According to historical tradition, he was a Roman citizen who received consecration from Saint Peter before being sent to convert the local population to the Christian faith. He is recognized as the founder of his diocese, and his sister, Saint Poma, is also honored as a saint.
Life and work

Memmius lived during the late 3rd century, with his life spanning approximately from 250 to 300. As a missionary, he played a central role in establishing Christianity in his region. While some traditions link him to the era of Saint Peter, other historical accounts, such as those by Flodoard, suggest he was a contemporary of Sixtus, the bishop of Reims.
Veneration
The saint is commemorated on August 5. His reputation for holiness was noted by Gregory of Tours, who recorded that his servant was healed of a fever after Gregory prayed at the tomb of Memmius. He is honored in the Catholic and Orthodox traditions, and his legacy is shared with his successors, Donatian and Domitian, who were also venerated as saints.
