Columbia subject headings:
Harvard subject headings:
Catacombs--Italy--Nepi.
Nepi (Italy)--Antiquities.
Princeton subject headings:
Catacombs--Italy--Nepi.
Christian antiquities--Italy--Nepi.
Inscriptions, Latin--Italy--Nepi.
Nepi (Italy)--Antiquities.
Nepi (Italy)--Church history.