Columbia subject headings:
Social history--Medieval, 500-1500--Congresses.
Social mobility--Europe--History--Congresses.
Harvard subject headings:
Elite (Social sciences)--Europe--History to 1500--Congresses.
Social history--Medieval, 500-1500--Congresses
Social mobility--Europe--History--To 1500--Congresses.
Princeton subject headings:
Social classes--Europe--History--Congresses.
Social history--Medieval, 500-1500--Congresses.
Social mobility--Europe--History--Congresses.
Social structure--Europe--History--Congresses.