Columbia subject headings:
Architecture--Italy--Lombardy--Congresses.
Architecture--Italy--Rome--Congresses.
Building materials--Italy--Lombardy--History--Congresses.
Building materials--Italy--Rome--History--Congresses.
Building--Italy--Lombardy--History--Congresses.
Building--Italy--Rome--History--Congresses.
Harvard subject headings:
Architecture--Italy--Lombardy--Congresses.
Architecture--Italy--Rome--Congresses.
Building material--Italy--Lombardy--History--Congresses.
Building material--Italy--Rome--History--Congresses.
Building--Italy--Lombardy--History--Congresses.
Building--Italy--Rome--History--Congresses.
Princeton subject headings:
Architecture--Italy--Lombardy--Congresses.
Architecture--Italy--Rome--Congresses.
Building material--Italy--Lombardy--History--Congresses.
Building material--Italy--Rome--History--Congresses.
Building--Italy--Lombardy--History--Congresses.
Building--Italy--Rome--History--Congresses.