Columbia subject headings:
Art, Spanish--Spain--Aragon.
Art--Collectors and collecting--United States.
Harvard subject headings:
Art, Medieval--Spain--Aragon--Catalogs.
Art, Spanish--Collectors and collecting--United States.
Art, Spanish--United States--Catalogs.
Princeton subject headings:
Art, Spanish--Spain--Aragon.
Art--Collectors and collecting--United States.