Via Postumia
Via Postumia was, as we learn from an inscription (Orell. Inscr. 3121), the proper name of the road that crossed the Apennines direct from Dertona to Genua. But it appears to have fallen into disuse; at least we do not find it mentioned by any ancient writer, and the road itself is included by the Itineraries under the general name of the Via Aurelia. It has therefore been considered more convenient to describe it in that article.
From William Smith (ed.), Dictionary of Greek and Roman Geography. Text provided under a CC BY-SA license by Perseus Digital Library, http://www.perseus.tufts.edu, with funding from the National Endowment for the Humanities and Tufts University. Data accessed from https://github.com/PerseusDL/canonical-pdlrefwk/ on 17 October 2026.