Columbia subject headings:
Harvard subject headings:
Geology--Italy--Umbria.
Painting--Italy--Umbria--History.
Umbria (Italy)--Church history.
Umbria (Italy)--History.
Princeton subject headings:
Geology--Italy--Umbria.
Painting--Italy--Umbria--History.
Umbria (Italy)--Church history.
Umbria (Italy)--History.