Columbia subject headings:
Altarpieces, Spanish--Spain--Riglos.
Art, Spanish--Spain--Aragon.
Art--Collectors and collecting.
Harvard subject headings:
Art, Spanish--Foreign countries.
Art--Collectors and collecting
Art--Spain--Aragon.
Lost articles
Princeton subject headings:
Altarpieces, Spanish--Spain--Riglos.
Art, Spanish--Spain--Aragon.
Art--Collectors and collecting.