Columbia subject headings:
Catacombs--Italy--Rome--History.
Christian saints--Cult--History.
Christian saints--Cult--Italy--Rome--History.
Relics--History.
Relics--Italy--Rome--History.
Rome (Italy)--Religious life and customs.
Harvard subject headings:
Catacombs--Italy--Rome--History.
Christian saints--Cult--History.
Christian saints--Cult--Italy--Rome--History.
Relics--History.
Relics--Italy--Rome--History.
Rome (Italy)--Religious life and customs.
Princeton subject headings:
Catacombs--Italy--Rome--History.
Christian saints--Cult--Italy--Rome--History.
Relics--Italy--Rome--History.
Rome (Italy)--Church history.
Rome (Italy)--Religious life and customs.