Serge Koussevitzky, Russian-American bassist, composer, and conductor (d. 1951)
Serge Alexandrovich Koussevitzky (Russian: Серге́й Алекса́ндрович Кусеви́цкий; Sergey Aleksandrovich Kusevitsky; 26 July [O.S. 14 July] 1874 – 4 June 1951) was a Russian-born conductor, composer and double-bassist, known for his long tenure as music director of the Boston Symphony Orchestra from 1924 to 1949.