The Treverians or Treverians are one of the Celtic peoples.
Gallic people of Belgian Gaul whose vast territory extended over part of Belgian Luxembourg, the Grand Duchy of Luxembourg, and the German Lower Moselle. Their king Indutiomare made life difficult for Julius Caesar for several years and they were not subjugated until 52 BC. AD But, for another century, they revolted sporadically.
Caesar called them Germans. Was it because of their breeches (trousers), or because of their language? It seems that in the 3rd and 4th centuries the vehicular language, at least in their capital Augusta Treverorum (Trèves in French, Trier, in German) was a Gallic dialect. In this sense, Saint Jerome testifies, "in his Commentary on the Epistle to the Galatians, that the Treveri speak the same language as the Galatians of Asia Minor, descendants of Celtic Gauls, survivors of the Brennus expedition to Delphi". (Jean Markale, “The Celtic Woman”, Petite Bibliothèque Payot, Paris, 1989, p.53).
At that time too, Trier became, following the reform of the Emperor Diocletian, the capital of his Caesar, deputy emperor called to succeed him at the head of the western part of the Roman Empire. One of the following Caesars Constantine I resided for several years in Trier.
In Roman times, the Treveri were very good farmers:they had developed a harvester pushed by a donkey, represented on a bas-relief and which archaeologists were able to reconstruct and make work in the 1950s. relief being the only testimony of this agricultural machine, it should not have had a great diffusion. The Treveri were also famous for their horse breeding.