The first of these extended from the Pyrenees to the Garumna (Garonne); the second, from that river to the Sequana (Seine) and its chief tributary the Matrona (Marne), reaching eastward presumably as far as the Rhenus (Rhine); and the third, from this bounding Iline to the mouth of the last-named river, thus bordering on the Germans.
Remains of the bridge of the Via Aemilia over the Rhenus have also been found - consisting of parts of the parapets on each side, in brick-faced concrete which belong to a restoration, the original construction (probably by Augustus in 2 B.C.) having been in blocks of Veronese red marble - and also of a massive protecting wall slightly above it, of late date, in the construction of which a large number of Roman tombstones were used.
The 79th milestone from Ariminum found in the bed of the Rhenus at Bononia records the restoration of the road by Augustus from Ariminum to the river Trebia in 2 B.C. (Notiz.