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.