Columbia subject headings:
Christian pilgrims and pilgrimages--Europe--Congresses.
Christian shrines--Europe--Congresses.
Europe--Religious life and customs--Congresses.
Pilgrims and pilgrimages--Europe--Congresses.
Harvard subject headings:
Pilgrims and pilgrimages--Europe--History--Congresses.
Princeton subject headings:
Christian pilgrims and pilgrimages--Europe--Congresses.
Christian shrines--Europe--Congresses.
Europe--Religious life and customs--Congresses.
Pilgrims and pilgrimages--Europe--Congresses.