He has served as music director of the La Scala opera house in Milan , principal conductor of the London Symphony Orchestra , principal guest conductor of the Chicago Symphony Orchestra , music director of the Vienna State Opera , and principal conductor of the Berlin Philharmonic orchestra from 1989 to 2002 , when he retired from the position for health reasons .
In the US , he was principal guest conductor of the Chicago Symphony Orchestra from 1982 to 1986 .
In the US , he was principal guest conductor of the Chicago Symphony Orchestra from 1982 to 1986 .
Vereinfachung: He has served as music director of the La Scala opera house in Milan , principal conductor of the London Symphony Orchestra , principal guest conductor of the Chicago Symphony Orchestra , music director of the Vienna State Opera , and principal conductor of the Berlin Philharmonic orchestra from 1989 to 2002 , when he retired from the position for health reasons . Ausgabe: