Columbia subject headings:
Harvard subject headings:
Cardinals--Tombs--Europe--Congresses.
Cardinals--Tombs--Italy--Rome--Congresses.
Popes--Tombs--Italy--Rome--Congresses.
Sepulchral monuments--Europe--Congresses.
Sepulchral monuments--Italy--Rome--Congresses.
Princeton subject headings:
Cardinals--Tombs--Europe--Congresses.
Cardinals--Tombs--Italy--Rome--Congresses.
Popes--Tombs--Italy--Rome--Congresses.
Sepulchral monuments--Europe--Congresses.
Sepulchral monuments--Italy--Rome--Congresses.