Columbia subject headings:
Holy Roman Empire--Politics and government.
Harvard subject headings:
Holy Roman Empire--Politics and government--Sources.
Holy Roman Empire--Politics and government.
Holy Roman Empire. Kurfürstentag (1558 : Frankfurt am Main, Germany)--History--Sources.
Holy Roman Empire. Reichstag (1566 : Augsburg, Germany)--History--Sources.
Princeton subject headings:
Holy Roman Empire--History--1517-1648--Sources.
Holy Roman Empire. Kurfürstentag (1558 : Frankfurt am Main, Germany)--History--Sources.
Holy Roman Empire. Reichstag (1559 : Augsburg, Germany)--History--Sources.