Columbia subject headings:
Architecture, Roman--Spain--Catalonia.
Architecture, Romanesque.
Architecture--Spain--Catalonia.
Church architecture--Spain.
Harvard subject headings:
Architecture, Roman--Spain.
Architecture, Romanesque
Architecture--Spain--Catalonia.
Church architecture--Spain.
Princeton subject headings:
Architecture, Roman--Spain.
Architecture, Romanesque.
Architecture--Spain--Catalonia.
Church architecture--Spain.