James Madison served as the fourth president of the United States, from 1809-1816. Wikimedia Commons hide caption

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'Round' by Milton Babbitt

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Milton Babbitt, a composer and director of Columbia Princeton Electronic Music Centre in New York. Keystone/Getty Images hide caption

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Avant-Garde Composer, Teacher Milton Babbitt Dies At 94

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Sondheim, shown here in 1974, won the Pulitzer Prize in Drama for Sunday in the Park with George. He has also received eight Tony Awards, eight Grammy awards and a Kennedy Center Honor. Hulton Archive/Getty Images hide caption

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At 80, Musical-Theater Icon Stephen Sondheim Looks Back

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A 'Difficult' Composer: Milton Babbitt at 90

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