The origin of the various villages that later gave birth to Erba is quite ancient. The place was in fact inhabited in epochs preceding the Roman one; The Orobi, the Ligurians and the Celts would have alternated there, but above all the latter left their customs. The discovery of some flint tools at the Buco del Piombo suggests that the area was already inhabited by man around 30,000 BC [6].
It is known from the Roman period that both the via Mediolanum-Bellasium passed through Herba, the Latin name of Erba, which connected Milan with Bellagio, and the road that, from Aquileia, passing through Como, led to Rezia [6]. Three necropolises found in the village of Incino date back to the same period, some epigraphs and votive altars inside the bell tower of Sant'Eufemia and a stretch of aqueduct that came to light in Crevenna. [6] However, it is still not clear today whether the territory of Erba actually corresponded to the center of Licini Forum, mentioned by Pliny the Younger among the inhabited areas of the Orobi [6].