Polish-born conductor Jerzy Semkow passed away at the age of 86.

Jerzy Semkow (12 October 1928 – 23 December 2014)
was a Polish conductor.A longtime French citizen who resided in Paris, Semkow served as principal conductor of the National Opera in Warsaw (1959-1962), the Royal Danish Opera and Orchestra in Copenhagen (1966 to 1976), and as Music Director of the Orchestra of Radio-Televisione Italiana (RAI) in Rome. Between 1975 and 1979 he was Music Director of the Saint Louis Symphony Orchestra. He was an assistant conductor with Evgeny Mravinsky with the Leningrad Philharmonic Orchestra. Semkow enjoyed long associations as a regular guest conductor with American orchestras, including the Detroit Symphony and the Rochester Philharmonic. His mentors included Erich Kleiber, Bruno Walter and Tullio Serafin.  Born in Radomsko Poland. WIKIPEDIA BIO