Columbia subject headings:
Harvard subject headings:
Church architecture--Spain--La Rioja--Congresses.
San Millán de la Cogolla (Monastery)--Congresses.
Princeton subject headings:
Christian art and symbolism--Spain--San Millán de la Cogolla--Congresses.
Church architecture--Spain--San Millán de la Cogolla--Congresses.
Monasteries--Spain--San Millán de la Cogolla--Congresses.
San Millán de la Cogolla (Monastery)