Bruno Walter (born Bruno Schlesinger, September 15, 1876 – February 17, 1962) was a German-born conductor, pianist and composer. Born in Berlin, he escaped Nazi Germany in 1933, was naturalised as a French citizen in 1938, and settled in the United States in 1939. He worked closely with Gustav Mahler, whose music he helped to establish in the repertory, held major positions with the Leipzig Gewandhaus Orchestra, New York Philharmonic, Concertgebouw Orchestra, Salzburg Festival, Vienna State Opera, Bavarian State Opera, Staatsoper Unter den Linden and Deutsche Oper Berlin, among others, made recordings of historical and artistic significance, and is widely considered to be one of the great conductors of the 20th century.

Autograph type: Entirely autographed and signed letter from Bruno Walter, a well-known Austrian naturalized German conductor, pianist and composer. Letter on headed paper Grand Hotel Continental in Milan written in Milan on 5 April 1931 and addressed to Enzo Martinenghi Principal Cellist of the Orchestra of the Teatro alla Scala in Milan. Walter compliments Martinenghi on how he played the great solo of Strauss's Don Quixote under his direction in 1926 and now in Mozart's Don Giovanni.