The Romans, who penetrated the region in the fourth century B.C.E., called the city Barium and made it a municipium, that is, a settlement that was inhabited by Roman citizens and that retained its own administrative independence.
Roomlased, kes tungisid sellesse piirkonda neljandal sajandil e.m.a, kutsusid seda linna Bariumiks ja tegid sellest munitsiipiumi – Rooma kodanikega asustatud asula, mis säilitas omavalitsuse.