Columbia subject headings:
Church history--12th century.
Civilization, Medieval.
Europe--Civilization.
Holy Roman Empire--History--Hohenstaufen, 1138-1254.
Twelfth century.
Harvard subject headings:
Church history--12th century.
Civilization, Medieval
Europe--Civilization--History.
Holy Roman Empire--History--Hohenstaufen, 1138-1254.
Twelfth century.
Princeton subject headings:
Church history--12th century.
Civilization, Medieval.
Europe--Civilization--History.
Holy Roman Empire--History--Hohenstaufen, 1138-1254.
Twelfth century.