Columbia subject headings:
Ballet--History--Congresses.
Meyerbeer, Giacomo, 1791-1864--Criticism and interpretation--Congresses.
Meyerbeer, Giacomo, 1791-1864--Influence--Congresses.
Music theater--History--Congresses.
Opera--History--Congresses.
Harvard subject headings:
Music theater--History--19th century--Congresses.
Opera--19th century--Congresses.
Princeton subject headings:
Ballet--History--Congresses.
Meyerbeer, Giacomo, 1791-1864--Criticism and interpretation--Congresses.
Meyerbeer, Giacomo, 1791-1864--Influence--Congresses.
Music theater--History--Congresses.
Opera--History--Congresses.