this hill was left open to be built upon by the growing city; and on the other hand upon the Tarpeian Hill, standing free on every side, and from its moderate extent easily defensible, there was constructed the new "stronghold" (-arx-, -capitolium-(10)), containing the stronghold-spring, the carefully enclosed "well-house" (-tullianum-), the treasury (-aerarium-), the prison, and the most ancient place of assemblage for the burgesses (-area Capitolina-), where still in after times the regular announcements of the changes of the moon continued to be made. Private dwellings of a permanent kind, on the other hand, were not tolerated in earlier times on the stronghold-hill;(11) and the space between the two summits of the hill, the sanctuary of the evil god (-Ve-diovis-), or as it was termed in the later Hellenizing epoch, the Asylum, was covered with wood and presumably intended for the reception of the husbandmen and their herds, when inundation or war drove them from the plain. The Capitol was in reality as well as in name the Acropolis of Rome, an independent castle capable of being defended even after the city had fallen: its gate lay probably towards what was afterwards the Forum.(12) The Aventine seems to have been fortified in a similar style, although less strongly, and to have been preserved free from permanent occupation. With this is connected the fact, that for purposes strictly urban, such as the distribution of the introduced water, the inhabitants of Rome were divided into the inhabitants of the city proper (-montani-), and those of the districts situated within the general ring-wall, but yet not reckoned as strictly belonging to the city (-pagani Aventinensis-, -Ianiculenses-, -collegia Capitolinorum et Mercurialium-).(13) The space enclosed by the new city wall thus embraced, in addition to the former Palatine and Quirinal cities, the two federal strongholds of the Capitol and the Aventine, and also the Janiculum;(14) the Palatine, as the oldest and proper city, was enclosed by the other heights along which the wall was carried, as if encircled with a wreath, and the two castles occupied the middle.