Columbia subject headings:
Catholic Church--Germany--Mainz (Rhineland-Palatinate)--History.
Catholic church buildings--Germany--Mainz (Rhineland-Palatinate)--History.
St. Stephan in Mainz (Church)
Harvard subject headings:
Mainz (Rhineland-Palatinate, Germany)--Church history.
St. Stephan in Mainz (Church)
Willigis, Archbishop of Mainz, -1011
Princeton subject headings: