The Latin Library had opus sectile pavements, and a few fragments restored fragments remain in situ. Therefore it belonged to the noble and imperial quarters of the Villa. The two-seater latrine confirms this destination.
The walls have the holes of the nails of the marble revetment.
The name Latin Library is obviously fictitious and was created to distinguish this building from the nearby Greek Library (n. 14).
The two buildings were named Libraries in the sixteenth century by Pirro Ligorio, who thought that the rectangular niches could contain papyri and manuscripts. He called them them "Greek" and "Latin" simply because they were two.
Actually in the niches there there are no traces of shelves.
According to Filippo Coarelli, the Libraries could be two summer triclinia, because they were oriented towards the north. But this is not very likely, since there is no place for a stibadium, which was found instead in all the other triclinia identified in the Villa.
Finally, according to Kähler, the Libraries resemble the Vitruvian turres of the Villas, a sort of Propyilae, and this is perhaps the most convincing idea.
The two Libraries probably were two monumental atria decorated with statues, which marked the access to the private quarters of the Villa for those coming from the north. An imposing building, a symbol of imperial luxury and wealth.
As in the Greek Library, a series of rooms with irregular shape served to compensate the different orientation of the building and of the Courtyard of the Libraries.