Portus Herculis is located on the eastern side of the Monte Argentario peninsula, about 40 km south-east of Grosseto and about 7 km south-west of Orbetello. and about 12 km from Porto Santo Stefano. The site was in use as a port during the Etruscan, Roman, and Late Antique phases of occupation. It is included on the Peutinger map and in the Itinerarium Maritimum.
Description via Pleiades. Coordinates and heritage data from the Atika atlas.
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