The two last chambers of the itineray, brought to light
in 2002, were subject to an infinite number of adaptations
and transformations which make it extremely difficult to
interpret both their original use and their later modifications.
Archaeologists have suggested that they were used for keeping
animals, as a necropolis, an enormous unfinished cistern,
a settlement of dwellings, a dye-works, a tannery, and even
as a baths complex.
Fortunately, however, the presence of two niches with side
basins msuggest that this was a necropolis excavated from
the rock; in fact, almost identical structures are found
in the older tombs of Norchia, in Lazio, which also have
other similarities in common with these chambers, such as
the horizontal channels along the walls and a multitude
of holes cut into the tufa.
The rarity of such a discovery
lies in the fact that until a year ago burials pre-dating
the period of Etruscan settlement at Orvieto, had never
been discovered in the area