Ham·mer·stein (hămʹər-stīn', -stēn'), Oscar. 1846?-1919.
German-born American operatic manager who founded opera houses in Harlem (1888) and Manhattan (1906). His grandson Oscar Hammerstein II (1895-1960), a lyricist, collaborated on many musicals and is best known for his efforts with Richard Rodgers, such as Oklahoma! (1943) and The Sound of Music (1959).
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