the diocesan boundaries which the Roman church gave to Praeneste.

The Christian faith had one of its longest and hardest fights at
Praeneste to overcome the old Roman cult of Fortuna Primigenia.
Christianity triumphed completely, and Praeneste 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 Praeneste, 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 Praenestine
territory called Marmorata,[4] which seems best located near the town of
Genazzano.

About the year 970 the territory of Praeneste 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
Praeneste 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 Praeneste and mark very nearly the
ancient boundary. The towns of Valmontone, Cave, and Poli, however,
although in a great degree dependent upon Praeneste, were, I think, just