Columbia subject headings:
Architecture, Romanesque--Spain--País Vasco--Encyclopedias.
Architecture--Spain--País Vasco--Encyclopedias.
Art, Romanesque--Spain--País Vasco--Encyclopedias.
Art, Spanish--Spain--País Vasco--Encyclopedias.
Harvard subject headings:
Princeton subject headings:
Architecture, Romanesque--Spain--País Vasco.
Christian art and symbolism--Spain--País Vasco.
Church decoration and ornament--Spain--País Vasco.
País Vasco (Spain)--Buildings, structures, etc.