Columbia subject headings:
Holy Roman Empire--History--Konrad III, 1138-1152.
Konrad III, King of the Romans, 1093-1152.
Harvard subject headings:
Holy Roman Empire--History--Konrad III, 1138-1152.
Konrad III, King of the Romans, 1093-1152.
Princeton subject headings:
Holy Roman Empire--History--Konrad III, 1138-1152.
Konrad III, King of the Romans, 1093-1152.