 Greeks from Aegina and later from Syracuse by Dionysius I colonised the city making it into an emporion.Greeks had been trading with the Veneti from the sixth century BC at least, especially the amber, originally coming from the Baltic sea.Mass Celtic incursions into the Po valley resulted in friction between the Gauls and Etruscans and intermarriage, attested by epigraphic inscriptions on which Etruscan and Celtic names appear together.