Columbia subject headings:
Apses (Architecture)--Spain--Seo de Urgel.
Architecture, Romanesque--Spain--Seo de Urgel.
Church architecture--Spain--Seo de Urgel.
Harvard subject headings:
Princeton subject headings:
Apses (Architecture)--Spain--Alt Urgell Region.
Architecture, Romanesque--Spain--Alt Urgell Region.
Christian art and symbolism--Medieval, 500-1500.
Church architecture--Spain--Alt Urgell Region.