Columbia subject headings:
Alcobaça (Monastery)
Cistercian architecture--Portugal--Congresses.
Cistercian art--Portugal--Congresses.
Cistercian monasteries--Portugal--Congresses.
Cistercian monasteries--Spain--Congresses.
Harvard subject headings:
Alcobaça (Monastery)
Cistercian architecture--Portugal--Congresses.
Cistercian art--Portugal--Congresses.
Cistercian monasteries--Portugal--Congresses.
Cistercian monasteries--Spain--Congresses.
Princeton subject headings: