 Its capital was "Aduatuca Tungrorum", which is modern Tongeren.Like many Roman administrative districts, this one was named after the tribal grouping that lived there, the Tungri, although in this case the Tungri is not a name 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, although the bishops of Tongeren moved first to nearby Maastricht and then Liège.