in North Gallia, on the road from Augusta Trevirorum (Trier
) to Colonia Agrippina (Cologne
The distance of Tolbiacum from Colonia is xvi. in the Antonine Itin. Tolbiacum is Zülpich,
south-west of Bonn,
on the direct road from Trier
The words “vicus supernorum” or “vicus supenorum,” which occur in the MSS. of the Itin. after the name “Tolbiaco,” have not been explained. Several writers have proposed to alter them. Tacitus (Tac. Hist. 4.79
) places Tolbiacum within the limits of the territory of the Agrippinenses or the Colonia Agrippina.