Columbia subject headings:
Harvard subject headings:
Nobility--Religious life--Germany--Halle an der Saale--History--18th century--Congresses.
Pietism--Germany--Halle an der Saale--History--18th century--Congresses.
Princeton subject headings:
Nobility--Religious life--Germany--Halle an der Saale--History--18th century.
Pietism--Germany--Halle an der Saale--History--18th century.