Columbia subject headings:
Museum architecture--Italy--Umbria--Congresses.
Museums--Italy--Umbria--Congresses.
Harvard subject headings:
Art, Italian--Italy--Umbria--Congresses.
Cultural property--Protection--Italy--Umbria--Congresses.
Museums--Italy--Umbria--Congresses.
Princeton subject headings:
Art, Italian--Umbria--Congresses.
Museums--Italy--Umbria--Congresses.