Columbia subject headings:
Architecture, Romanesque--Spain--Santo Domingo de la Calzada--Congresses.
Catedral (Santo Domingo de la Calzada, Spain)--Congresses.
Santo Domingo de la Calzada (Spain)--Buildings, structures, etc.--Congresses.
Harvard subject headings:
Architecture, Romanesque--Spain--Santo Domingo de la Calzada--Congresses.
Catedral (Santo Domingo de la Calzada, Spain)--Congresses.
Santo Domingo de la Calzada (Spain)--Buildings, structures, etc.--Congresses.
Princeton subject headings:
Architecture, Romanesque--Spain--Santo Domingo de la Calzada--Congresses.
Catedral (Santo Domingo de la Calzada, Spain)--Congresses.
Santo Domingo de la Calzada (Spain)--Buildings, structures, etc.