Columbia subject headings:
Harvard subject headings:
Austria--History--Congresses.
Civilization, Medieval--Congresses
Europe--History--Congresses.
Fichtenau, Heinrich--Congresses.
Middle Ages--Congresses
Princeton subject headings:
Austria--History--1273-1519--Congresses.
Austria--History--To 1273--Congresses.
Fichtenau, Heinrich--Congresses.