A.D. 69-79. Under Vespasian, however, a great change took place. Thanks to the munificence of that emperor, who had a great liking for Aventicum, this city lost its Celtic character, and was made a splendid city after the Italian type. He had sent there his befriended and faithful Flavian colony of the Helvetians to live, giving her the lengthy title of Colonia Pia Flavia Constans Emerita Helvetiorum Foederata in return for services, for she had staunchly supported his party against Vitellius when the latter contended with Galba for the imperial throne. The inhabitants most likely received the Latin Right (_Droit Latin_), or were considered Roman citizens, and as such were more intimately connected with Rome, and had to submit to closer control. Her institutions were assimilated to those of Italian towns. She had a senate, a council of decuriones, city magistrates, a _præfectus operum publicorum_ (or special officer to attend to the construction of public buildings), Augustan flamens, or priests, and so forth. Notwithstanding the overwhelming importance of Aventicum, a certain amount of self-government was left to the country districts, towns, and villages (_vici_). The inhabitants of Vindonissa (Windisch), Aquæ (Baden), Eburodunum (Yverdon), Salodurum (Soleure), erected public buildings of their own accord. The towns of the Valais, Octodurum (Martigny), Sedunum (Sion), &c., had their own city council and municipal officers, and received the Latin Right. In the case of the Helvetians, those of the capital and those of the provinces equally enjoyed that Right; whereas, with Augusta Rauracorum, the case was different, only the colonists within the walled cities being granted the like standing and liberties. On the whole it may be said that, though Helvetia kept many of her own peculiarities, and some of her ancient liberties, she submitted to Rome, and was greatly influenced by the advanced civilization of the empire. The Helvetians, indeed, underwent that change of speech and character, which split them into two nations, French and Germans. One of the chief factors contributing to the Roman colonization of Helvetia was the military occupation of its northern frontier, though this occupation weighed heavily on the country. The great object of Rome was to keep back the Germans, who were for ever threatening to break into the empire. Vindonissa was one of the military headquarters, and its selection for the purpose was justified by its excellent position, situated as it was on an elevated neck of land, washed by three navigable rivers, the Aare, Reuss, and Limmat, and at the junction of the two great roads connecting East and West Helvetia with Italy. A capital system of roads, too, was planned all over the country.