Columbia subject headings:
Architecture--Portugal--History--20th century.
Architecture--Spain--History--20th century.
Church architecture--Portugal.
Church architecture--Spain.
Portugal--Church history.
Protestant church buildings--Portugal.
Protestant church buildings--Spain.
Spain--Church history.
Harvard subject headings:
Architecture and religion--History--20th century.
Church architecture--Germany--History--20th century.
Church architecture--Portugal--History--20th century.
Church architecture--Spain--History--20th century.
Princeton subject headings: