Columbia subject headings:
Christian antiquities--Italy--Viterbo.
Inscriptions, Latin--Italy--Viterbo.
Viterbo (Italy)--Antiquities.
Harvard subject headings:
Christian antiquities--Italy--Viterbo.
Inscriptions, Latin--Italy--Viterbo.
Viterbo (Italy)--Antiquities.
Princeton subject headings:
Christian antiquities--Italy--Viterbo.
Inscriptions, Latin--Italy--Viterbo.
Viterbo (Italy)--Antiquities.