Columbia subject headings:
German poetry--Middle High German, 1050-1500--History and criticism--Congresses.
Minnesingers--Congresses.
Harvard subject headings:
German poetry--Middle High German, 1050-1500--History and criticism--Congresses.
Minnesingers--Congresses.
Princeton subject headings:
Walther, von der Vogelweide, active 12th century.