Cadenzas
Cadenzas for the Fourth Piano Concerto have been written by a number of pianists and composers throughout its history; these include Clara Schumann, Ferruccio Busoni, Hans von Bülow, Ignaz Moscheles, Camille Saint-Saëns, Anton Rubinstein, Nikolai Medtner, Eugen d'Albert, Leopold Godowsky, Samuil Feinberg and Marc-Andre Hamelin.
Read more about this topic: Piano Concerto No. 4 (Beethoven)