Columbia subject headings:
Harvard subject headings:
Architecture, Gothic--Congresses.
Catholic Church--Liturgy--History--To 1500--Congresses.
Christian art and symbolism--Medieval, 500-1500--Congresses
Liturgy and architecture--Congresses.
Princeton subject headings:
Catholic Church--Europe--Liturgy--History--To 1500--Congresses.
Christian art and symbolism--Europe--Medieval, 500-1500--Congresses.
Liturgy and architecture--Congresses.