Columbia subject headings:
Harvard subject headings:
Catholic Church--Liturgy--History--Congresses.
Processions, Religious--Catholic Church--History--Congresses.
Processions, Religious--History--Congresses.
Religion and culture--Germany--History--Congresses.
Princeton subject headings:
Festivals--Congresses.
Memorials--Congresses.
Pilgrims and pilgrimages--Congresses.
Political customs and rites--Congresses.
Processions, Religious--Congresses.
Processions--Congresses.
Rites and ceremonies--Congresses.
Triumph--Congresses.