Columbia subject headings:
Christian antiquities--Italy--Rome.
Church history--Primitive and early church, ca. 30-600.
Excavations (Archaeology)--Italy--Rome.
Rome (Italy)--Antiquities, Roman.
Harvard subject headings:
Basilicas--Italy--Rome--Congresses.
Christian antiquities--Italy--Rome--Congresses.
Church history--Primitive and early church, ca. 30-600--Congresses.
Excavations (Archaeology)--Italy--Rome--Congresses.
Princeton subject headings:
Christian antiquities--Italy--Rome--Congresses.
Excavations (Archaeology)--Italy--Rome--Congresses.
Rome (Italy)--Antiquities--Congresses.