From The Encyclopaedia Britannica, August 22, 2006:
http://www.britannica.com/eb/article-9011900

George Balanchine

born January 22 [January 9, Old Style], 1904, St. Petersburg, Russia
died April 30, 1983, New York, New York, U.S.

Photograph:George Balanchine.
George Balanchine.
©1983 Martha Swope

... most influential choreographer of classical ballet in the United States in the 20th century. His works, characterized by a cool neoclassicism, include The Nutcracker (1954) and Don Quixote (1965), both pieces choreographed for the New York City Ballet, of which he was a founder (1948)....