Saint Memmius is venerated as the first bishop

Bishop

A bishop is an ordained or consecrated member of the Christian clergy who is generally entrusted with a position of authority and oversight. Within the Catholic Church, Eastern Orthodox, Oriental Orthodox Churches, in the Assyrian Church of the East, in the Independent Catholic Churches, and in the...

 of Châlons-sur-Marne (now Châlons-en-Champagne), and founder of the diocese.
According to tradition, Memmius was a Roman

Rome

Rome is the capital of Italy and the country's largest and most populated city and comune, with over 2.7 million residents in . The city is located in the central-western portion of the Italian Peninsula, on the Tiber River within the Lazio region of Italy.Rome's history spans two and a half...

 citizen who was consecrated by Saint Peter

Saint Peter

Saint Peter or Simon Peter was an early Christian leader, who is featured prominently in the New Testament Gospels and the Acts of the Apostles. The son of John or of Jonah and from the village of Bethsaida in the province of Galilee, his brother Andrew was also an apostle...

 and sent to Gaul

Gaul

Gaul was a region of Western Europe during the Iron Age and Roman era, encompassing present day France, Luxembourg and Belgium, most of Switzerland, the western part of Northern Italy, as well as the parts of the Netherlands and Germany on the left bank of the Rhine. The Gauls were the speakers of...

 to convert the people there to Christianity

Christianity

Christianity is a monotheistic religion based on the life and teachings of Jesus as presented in canonical gospels and other New Testament writings...

.

However, according to Flodoard

Flodoard

-Biography:He was born at Épernay, and educated at Reims in the cathedral school which had been established by Archbishop Fulcon .As canon of Reims, and favourite of the archbishops Herivaeus and Seulfus -Biography:He was born at Épernay, and educated at Reims in the cathedral school which had...

, he was a contemporary of Saint Sixtus

Sixtus of Reims

Saint Sixtus of Reims is considered the first bishop of Reims. According to Hincmar, a 9th century archbishop of Reims, Sixtus was sent from Rome by Pope Sixtus II to Gaul to assist in Christianizing the region. Another tradition makes him, anachronistically, the disciple of Saint...

, bishop of Reims. Memmius' sister, Poma, is also venerated as a saint.

Veneration

Saint Gregory of Tours writes that while traveling through Châlons, his servant fell sick from fever. Gregory prayed at Memmius' tomb and by the next morning Gregory’s servant had been cured. Memmius' immediate successors, Donatian and Domitian, were also venerated as saints.