Its capital was Aduatuca Tungrorum, now Tongeren.

Like many other Roman administrative districts, it was named after the tribal grouping that lived there, the Tungri, although that name is not known from the area before it became part of the Roman Empire. Also like other such districts, it became the basis for a medieval bishopric, but the bishops of Tongeren later moved to nearby Maastricht and then to Liège.