Columbia subject headings:
Harvard subject headings:
Children--Europe--History--To 1500--Congresses.
Children--History--Congresses.
Old age--Europe--History--To 1500--Congresses.
Older people--History--Congresses.
Social history--Medieval, 500-1500--Congresses
Princeton subject headings:
Children--History--Congresses.
Older people--History--Congresses.
Social history--Medieval, 500-1500--Congresses.