▁state ▁a ▁later ▁C elt ic ▁influence , ▁but ▁who ▁they ▁were ▁and ▁where ▁they ▁came ▁from ▁has ▁never ▁been ▁discovered ▁for ▁certain . ▁It ▁is ▁believed ▁that ▁their ▁main ▁economic ▁activities ▁were ▁trade ▁and ▁pi racy ▁all ▁over ▁the ▁ancient ▁Mediter rane an ▁Sea . ▁ ▁In ▁ 1 7 7 ▁BC , ▁the ▁town ▁was ▁conquer ed ▁by ▁the ▁Rom ans ▁and ▁destroyed . ▁Reb u ilt ▁upon ▁the ▁original ▁Hist rian ▁pattern , ▁it ▁was ▁a ▁Roman ▁town ▁until ▁ 4 6 – 4 5 ▁BC , ▁when ▁the ▁An cient ▁Greek ▁col ony ▁Pol ai ▁was ▁elev ated ▁to ▁Piet as ▁I ul ia , ▁today ▁P ula . ▁The ▁town ▁was ▁located ▁on ▁the ▁ancient ▁road ▁Via ▁F lav ia , ▁which ▁connected ▁Tri este ▁to ▁Dal mat ia . ▁The ▁area ▁was ▁abandoned ▁by ▁the ▁Rom ans ▁in ▁the ▁ 6 th ▁century , ▁following ▁the ▁S lav ▁invas ions . ▁Its ▁Hist ro - R oman ▁walls ▁still ▁remain . ▁ ▁References ▁ ▁External ▁links ▁ ▁N es act ium ▁on ▁Ist rian et . org ▁ ▁History ▁of ▁N es act ium ▁ ▁Ne ol ith ic ▁N es act ium ▁Hill fort ▁ ▁Category : I ron ▁Age ▁sites ▁in ▁Europe ▁Category : M eg al ith ic ▁monuments ▁in ▁Europe ▁Category : F ort s ▁in ▁Cro atia ▁Category : Arch ae ological ▁sites ▁in ▁Cro atia ▁Category : Form er ▁populated ▁places ▁in ▁the ▁B alk ans ▁Category : C ities ▁in