Columbia subject headings:
Harvard subject headings:
Frederick I, Landgrave of Thuringia, 1257-1324.
Friedrich, I, Margrave of Meissen and Landgrave of Thuringia, 1257-1323.
Wiprecht von Groitzsch, 1050?-1124.
Princeton subject headings:
Frederick I, Landgrave ofThuringia, 1257-1324.
Wiprecht, von Groitzsch, 1050?-1124.