Nuovi dati sulla ceramica a vernice nera e le anfore della città romana di Cosa (GR), Italia

Since 2016 the University of Florence has been stratigraphically investigating a sector of the Roman colony at Cosa (Ansedonia, Grosseto), at the crossing between streets P and 5. In 2017–2018 a new building was discovered halfway up street P, the processional way leading from the Forum to the Arx. This seems to be focused around a large central courtyard and a series of smaller rooms which open onto it. The function of this building has still to be deter-mined. From Building P comes a chronologically and typologically diverse assemblage of pot-tery, which includes a sizable quantity of Republican black-glaze numerous Dressel type 1A and 1B amphorae of Tyrrhenian production. Those are a precious indicator of the history of the colony since its foundation. Black-glazed pottery is attested in Cosa from the last quarter of the 3rd cent. B. C. to the third quarter of the 1st cent. B. C. Archaeometry has demon-strated it to be both imported and locally produced. The workshops of Dressel type 1A and 1B amphorae must have been partially located in the Ager Cosanus. The aim of the paper is investigate further the production and circulation of Cosa black-glazed pottery and TyrrhenianDressel 1 and its Mediterranean commercial network. Recent studies1 have shown that the Portus Cosanus was fully implicated in the network of harbours focused on Rome and on the specific wine trade to Gallia, and that its importance grew alongside the expansion of Roman trade in the western Mediterranean.