Alexis Sigismund Weissenberg (Bulgarian: Алексис Сигизмунд Вайсенберг; 26 July 1929 – 8 January 2012) was a Bulgarian-born French pianist.

[4] In 1945, they emigrated to Palestine, where Weissenberg studied under Leo Kestenberg and performed Beethoven with the Israel Philharmonic under the direction of Leonard Bernstein.

He had many notable students at his Piano Master Class in Engelberg (Switzerland), including Kirill Gerstein, Simon Mulligan, Ivan Moravec, Mehmet Okonsar, Nazzareno Carusi, Andrey Ponochevny, Loris Karpell, and Roberto Carnevale among them.

1, with Carlo Maria Giulini and Riccardo Muti, ("Les Introuvables d'Alexis Weissenberg", 2004), Rachmaninoff's Piano Concerto No.

When Karajan watched the movie, he immediately invited Weissenberg to participate in a filmed performance of the Tchaikovsky First Concerto, replacing Sviatoslav Richter.