Concrete masonry faced with blocks and opus reticulatum of Neapolitan yellow tuff
Roman Early Imperial period, ca. 1st half 1st c. CE
Napoli/Naples (ancient Neapolis; see on Pleiades), Soccavo neighborhood, Via Pigna
The tomb is of columbarium (dovecote) type with some elements of a chamber tomb, and is preserved only in one half, the remainder having been destroyed for the construction of the street (via Pigna) around 1820-1830. In addition to the preserved niches for cremation urns, three sarcophagi built in masonry were found when the monument was discovered. The funerary monument probably held the dead of a small agricultural settlement within the western suburb of ancient Neapolis. In late antiquity, the tomb was reused as a cistern, as attested by the presence of hydraulic mortar.
For more information see (in Italian), with links to further resources:
it.wikipedia.org/wiki/Colombarium_(Napoli)