ancient Præneste.

From the summit of the mountain, where the arx or citadel was, it becomes clear at once why Præneste occupied a proud and commanding position among the towns of Latium. The city, clambering up the slope on its terraces, occupied a notably strong position^[1], and the citadel was wholly impregnable to assault. Below and south of the city stretched fertile land easy of access to the Prænestines, and sufficiently distant from other strong Latin towns to be safe for regular cultivation. Further, there is to be added to the fortunate situation of Præneste with regard to her own territory and that of her contiguous dependencies, her position at a spot which almost forced upon her a wide territorial influence, for Monte Glicestro faces exactly the wide and deep depression between the Volscian mountains and the Alban Hills, and is at the same time at the head of the Trerus-Liris valley. Thus Præneste at once commanded not only one of the passes back into the highland country of the Æquians, but also the inland routes between Upper and Lower Italy, the roads which made relations possible between the Hernicans, Volscians, Samnites, and Latins. From Præneste the movements of Volscians and Latins, even beyond the Alban Hills and on down in the Pontine district, could be seen, and any hostile demonstrations could be prepared against or forestalled. In short, Præneste held the key to Rome from the south.

Monte Glicestro is of limestone pushed up through the tertiary crust by volcanic forces, but the long ridges which run off to the northwest are of lava, while the shorter and wider ones extending toward the southwest are of tufa. These ridges are from three to seven miles in length. It is shown either by remains of roads and foundations or (in three cases) by the actual presence of modern towns that in antiquity the tip of almost every one of these ridges was occupied by a city. The whole of the tufa and lava plain that stretches out from Præneste toward the Roman Campagna is flat to the eye, and the towns on the tips of the ridges seem so low that their strong military position is overlooked. The tops of these ridges, however, are everywhere more than an hundred feet above the valley and, in addition, their sides are very steep. Thus the towns were practically impregnable except by an attack along the top of the ridge, and as all these ridges run back to the base of the mountain on which Præneste was situated, both these ridges and their towns necessarily were always closely connected with Præneste and dependent upon her.

There is a simple expedient by which a conception of the topography of the country about Præneste can be obtained. Place the left hand, palm down, flat on a table spreading the fingers slightly, then the palm of the right hand on the back of the left with the fingers pointing at right angles to those of the left hand. Imagine that the mountain, on which Præneste lay, rises in the middle of the back of the upper hand, sinks off to the knuckles of both hands, and extends itself in the alternate ridges and valleys which the fingers and the spaces between them represent.

EXTENT OF THE DOMAIN OF PRÆNESTE.

Just as the modern roads and streets in both country and city of ancient territory are taken as the first and best proof of the presence of ancient boundary lines and thoroughfares, just so the territorial jurisdiction of a city in modern Italy, where tradition has been so constant and so strong, is the best proof for the extent of ancient domain.^[2] Before trying, therefore, to settle the limits of the domain of Præneste from the provenience of ancient inscriptions, and by deductions from ancient literary sources, and present topographical and archæological arguments, it will be well worth while to trace rapidly the diocesan boundaries which the Roman church gave to Præneste.

The Christian faith had one of its longest and hardest fights at Præneste to overcome the old Roman cult of Fortuna Primigenia. Christianity triumphed completely, and Præneste was so important a place, that it was made one of the six suburban bishoprics,^[3] and from that time on there is more or less mention in the Papal records of the diocese of Præneste, or Penestrino as it began to be called.

In the fifth century A.D. there is mention of a gift to a church by Sixtus III, Pope from 432 to 440, of a certain possession in Prænestine territory called Marmorata,^[4] which seems best located near the town of Genazzano.

About the year 970 the territory of Præneste was increased in extent by Pope John XIII, who ceded to his sister Stefania a territory that extended back into the mountains to Aqua alta near Subiaco, and as far as the Rivo lato near Genazzano, and to the west and north from the head of the Anio river to the Via Labicana.^[5]

A few years later, in 998, because of some troubles, the domain of Præneste was very much diminished. This is of the greatest importance here, because the territory of the diocese in 998 corresponds almost exactly not only to the natural boundaries, but also, as will be shown later, to the ancient boundaries of her domain. The extent of this restricted territory was about five by six miles, and took in Zagarolo, Valmontone, Cave, Rocca di Cave, Capranica, Poli, and Gallicano.^[6] These towns form a circle around Præneste and mark very nearly the ancient boundary. The towns of Valmontone, Cave, and Poli, however, although in a great degree dependent upon Præneste, were, I think, just outside her proper territorial domain.

In 1043, when Emilia, a descendant of the Stefania mentioned above, married Stefano di Colonna, Count of Tusculum, Præneste's territory seems to have been enlarged again to its former extent, because in 1080 at Emilia's death, Pope Gregory VII excommunicated the Colonna because they insisted upon retaining the Prænestine territory which had been given as a fief to Stefania, and which upon Emilia's death should have reverted to the Church.^[7]

We get a glance again at the probable size of the Prænestine diocese in 1190, from the fact that the fortieth bishop of Præneste was Giovanni Anagnino de' Conti di Segni (1190-1196),^[8] and this seems to imply a further extension of the diocese to the southeast down the Trerus (Sacco) valley.

Again, in 1300 after the papal destruction of Palestrina, the government of the city was turned over to Cardinal Ranieri, who was to hold the city and its castle (mons), the mountain and its territory. At this time the diocese comprised the land as far as Artena (Monte Fortino) and and Rocca Priora,