Columbia subject headings:
Architecture--Germany--Mainz (Rhineland-Palatinate)
Mainz (Rhineland-Palatinate, Germany)--Buildings, structures, etc.
Mainz (Rhineland-Palatinate, Germany)--History.
Harvard subject headings:
Architecture--Germany--Mainz (Rhineland-Palatinate)
Mainz (Rhineland-Palatinate, Germany)--Buildings, structures, etc.
Mainz (Rhineland-Palatinate, Germany)--History
Princeton subject headings:
Architecture--Germany--Mainz (Rhineland-Palatinate).
Historic buildings--Germany--Mainz (Rhineland-Palatinate).
Mainz (Rhineland-Palatinate, Germany)--Buildings, structures, etc.
Monuments--Germany--Mainz (Rhineland-Palatinate).