Columbia subject headings:
Architecture, Romanesque--Spain--Congresses.
Art, Romanesque--Spain--Congresses.
Church architecture--Spain--Congresses.
Harvard subject headings:
Architecture, Romanesque--Spain.
Art, Romanesque--Spain.
Church architecture--Spain.
Princeton subject headings:
Architecture, Romanesque--Spain--Congresses.
Art, Romanesque--Spain--Congresses.
Church architecture--Spain--Congresses.