that of Campania, the main city of which was Capua, and the Po Valley city-states in northern Italy, which included Bologna, Spina and Adria. Possible founding of Rome Those who subscribe to a Latin foundation of Rome followed by an Etruscan invasion typically speak of an Etruscan "influence" on Roman culture – that is, cultural objects which were adopted by Rome from neighbouring Etruria. The prevailing view is that Rome was founded by Latins who later merged with Etruscans. In this interpretation, Etruscan cultural objects are considered influences rather than part of a heritage. Rome was probably a small settlement until the arrival of the Etruscans, who constructed the first elements of its urban infrastructure such as the drainage system. The main criterion for deciding whether an object originated at Rome and traveled by influence to the Etruscans, or descended to the Romans from the Etruscans, is date. Many, if not most, of the Etruscan cities were older than Rome. If one finds that a given feature was there first, it cannot have originated at Rome. A second criterion is the opinion of the ancient sources. These would indicate that certain institutions and customs came directly from the Etruscans. Rome is located on the edge of what was Etruscan territory. When Etruscan settlements turned up south of the border, it was presumed that the Etruscans spread there after the foundation of Rome, but the settlements are now known to have preceded Rome. Etruscan settlements were frequently built on hills – the steeper the better – and surrounded by thick walls. According to Roman mythology, when Romulus and Remus founded Rome, they did so on the Palatine Hill according to Etruscan ritual; that is, they began with a pomerium or sacred ditch. Then, they proceeded to the walls. Romulus was required to kill Remus when the latter jumped over the wall, breaking its magic spell (see also under Pons Sublicius). The name of Rome is attested in Etruscan in the form Ruma-χ meaning 'Roman', a form that mirrors other attested ethnonyms in that language with the same suffix -χ: Velzna-χ '(someone) from Volsinii' and Sveama-χ '(someone) from Sovana'. This in itself, however, is not enough to prove Etruscan origin conclusively. If Tiberius is from θefarie, then Ruma would have been placed on the Thefar (Tiber) river. A heavily discussed topic among scholars is who was the founding population of Rome. In