His episcopate coincided with a time of political upheaval.
[5] At the end of the 4th century the Roman city of Augusta Treverorum (today known as Trier) ceased to be a residence of the emperor and from 410 the area was invaded by the Germans.
The significance of the church in Trier paled against this background, but it doubtless retained a local importance.
Mauricius is held to be the recipient of a letter from Pope Boniface I concerning the church in Arles.
It is unclear for how long Mauricius remained bishop: his successor may have been appointed in 407, or he may have been still in post in 419.