Sergei Koussevitzky

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