Columbia subject headings:
Music--Germany--Mainz (Rhineland-Palatinate, Germany)--18th century--History and criticism.
Harvard subject headings:
Friedrich Karl Joseph, Archbishop and Elector of Mainz, 1719-1802--Congresses.
Music--Germany--Mainz (Rhineland-Palatinate)--18th century--History and criticism--Congresses.
Princeton subject headings:
Music--Germany--Mainz (Rhineland-Palatinate)--18th century--History and criticism.