Columbia subject headings:
Europe--Boundaries--History.
Holy Roman Empire--Boundaries.
Harvard subject headings:
Cartography--Holy Roman Empire--History.
Europe--History.
Germany--History.
Holy Roman Empire--Boundaries.
Holy Roman Empire--History.
Holy Roman Empire--Maps--History.
Territory, National--Holy Roman Empire.
Princeton subject headings:
Europe--Boundaries--History.
Holy Roman Empire--Boundaries.