Columbia subject headings:
Catholic Church. Diocese of Mainz (Rhineland-Palatinate, Germany)--History.
Mainz Region (Rhineland-Palatinate, Germany)--Church history.
Harvard subject headings:
Catholic Church. Archdiocese of Mainz (Rhineland-Palatinate, Germany)--History.
Mainz Region (Rhineland-Palatinate, Germany)--Church history.
Princeton subject headings:
Catholic Church. Diocese of Mainz (Rhineland-Palatinate, Germany)--History.
Mainz Region (Germany)--Church history.