Frederick Martin "Fritz" Reiner (December 19, 1888 – November 15, 1963) was a prominent conductor of opera and symphonic music in the twentieth century. Hungarian born and trained, he emigrated to the United States in 1922, where he rose to prominence as a conductor with several orchestras. He reached the pinnacle of his career while music director of the Chicago Symphony Orchestra in the 1950s and early 1960s.
Reiner was born in Budapest, Austria-Hungary into a secular Jewish family that resided in the Pest area of the city. After preliminary studies in law at his father’s urging, Reiner pursued the study of piano, piano pedagogy, and composition at the Franz Liszt Academy. During his last two years there, his piano teacher was the young Béla Bartók. After early engagements at opera houses in Budapest and Dresden, where he worked closely with Richard Strauss, he moved to the United States of America in 1922 to take the post of Principal Conductor of the Cincinnati Symphony Orchestra. He remained until 1931, having become a naturalized citizen in 1928, then began to teach at the Curtis Institute in Philadelphia, Pennsylvania, where his pupils included Leonard Bernstein and Lukas Foss. He conducted the Pittsburgh Symphony Orchestra from 1938 to 1948 and made a few recordings with them for Columbia Records, then spent several years at the Metropolitan Opera, where he conducted a historic production of Strauss's Salome in 1949, with the Bulgarian soprano Ljuba Welitsch in the title role, and the American premiere of Igor Stravinsky's The Rake's Progress in 1951. He also conducted and made a recording of the famous 1952 Metropolitan Opera production of Bizet's Carmen, starring Rise Stevens. The production was telecast on closed circuit television that year. At the time of his death he was preparing the Met's new production of Wagner’s Götterdämmerung.