Columbia subject headings:
Holy Roman Empire--History--1273-1517.
Holy Roman Empire--History--1517-1648.
Mainz (Germany : Landkreis)--History.
Harvard subject headings:
Holy Roman Empire--History--1273-1517.
Holy Roman Empire--History--1517-1648.
Mainz Region (Rhineland-Palatinate, Germany)--History.
Princeton subject headings:
Holy Roman Empire--History--1273-1517.
Holy Roman Empire--History--1517-1648.
Mainz Region (Rhineland-Palatinate, Germany)--History.