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Philip Glass (born January 31, 1937) is a three-time Academy Award-nominated American classical music composer. He is considered one of the most influential composers of the late-20th century and is widely acknowledged as a composer who has brought art music to the American public (along with precursors such as Richard Strauss, Kurt Weill and Leonard Bernstein).

His music is described as minimalist, from which he distanced himself in being a composer of "music with repetitive structures". Although his early, mature music is minimalist, he has evolved stylistically. Currently, he describes himself as a "Classicist", trained in harmony and counterpoint and studied Johann Sebastian Bach, Ludwig van Beethoven, and Franz Schubert.

Glass is a prolific composer: he has written ensemble works, operas, eight symphonies, eight concertos, film scores, and solo works. Glass counts many visual artists, writers, musicians, and directors among his friends, including Richard Serra, Chuck Close, Doris Lessing, Allen Ginsberg, Errol Morris, Robert Wilson, JoAnne Akalaitis, John Moran, actors Bill Treacher and Peter Dean, Godfrey Reggio, Ravi Shankar, Linda Ronstadt, Paul Simon, David Bowie, Patti Smith, the conductor Dennis Russell Davies, and electronic musician Aphex Twin, who have all collaborated with him. Among recent collaborators are Glass's fellow New Yorkers Leonard Cohen, and Woody Allen. He composed an opera for the opening of Expo '98.