Columbia subject headings:
Architecture, Medieval--Europe--Congresses.
Catholic Church--Europe--Liturgy--History--Middle Ages, 600-1500--Congresses.
Christian art and symbolism--Europe--Medieval, 500-1500--Congresses.
Christian art and symbolism--Europe--Medieval, 500-1500.
Church architecture--Europe--History--Congresses.
Church architecture--Europe.
Liturgy and architecture.
Liturgy and art.
Harvard subject headings:
Catholic Church--Europe--Liturgy--History--Middle Ages, 600-1500--Congresses.
Christian art and symbolism--Medieval, 500-1500--Europe--Congresses.
Church architecture--Europe--Congresses.
Princeton subject headings:
Catholic Church--Europe--Liturgy--History--Middle Ages, 600-1500--Congresses.
Christian art and symbolism--Medieval, 500-1500--Europe--Congresses.
Church architecture--Europe--Congresses.