As regards the organization and constitution of individual and private property, the traditions themselves attribute this to the second king of Rome, the real founder of Roman society, who divided the territory among the citizens, marking off the limits of individual shares and placing them under the protection of religion. In this way a religious charter was granted to the institutions of private property. Thus a primitive division of territory appears to have been the basis of these varied traditions, but the precise form of this division eludes us. The Roman territory was confined for many ages to a surface of very limited extent, which properly bore the name of _Ager Romanus_. This name with signification slightly changed appeared to be still in use in the time of the empire, and even at the present day a portion of the Roman territory which very nearly corresponds to the ancient territory of the imperial period is called _Agro Romano.[7]_ That which was properly called _Ager Romanus_ at first only occupied the surface of a slightly expanded arc whose chord was the river Tiber.[8] Primitive Rome did not extend beyond the Tiber into Etruria, and toward Latium her possessions did not extend beyond the limits of some five or six miles reckoning from the Palatine. Toward the east the towns of Antemnae, Fidenae, Caenina, Collatia and Gabia lay in the immediate neighborhood, thus limiting the extension of the city in that direction within a radius of five or six miles;[9] and northward the Anio[10] formed the limit. To the southwest as you approach Lavinium, the sixth milestone marked the boundary of Rome. Thus with the possible exception of a small strip of land extending upon either bank of the Tiber to its mouth, and embracing the old site[11] of Ostia, have we marked out all of ancient Rome. Strabo[12] says it could be gone round in a single day. And according to this same author it was within these limits that the annual auspices[13] could be taken.