Columbia subject headings:
Art thefts--Italy--Marche--History.
Art, Italian--Italy--Marche.
Art--Collectors and collecting--Italy--Marche--History.
Harvard subject headings:
Art thefts--Italy--Marche--History.
Art, Italian--Italy--Marche.
Art--Collectors and collecting--Italy--Marche--History.
Art--Economic aspects--Italy--Marche--History.
Princeton subject headings:
Art thefts--Italy--Marche--History.
Art, Italian--Italy--Marche.
Art--Collectors and collecting--Italy--Marche--History.