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In page Symphony No. 7 (Piston):

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Piston's Seventh Symphony was commissioned by the Philadelphia Orchestra Association, and was premiered by that orchestra, conducted by Eugene Ormandy, on February 10, 1961. The symphony was awarded a Pulitzer Prize in 1961, which was the second time for Piston—his first was in 1948 for his Third Symphony (Archibald 1978, 266–67). It bears some resemblance to Piston's Three New England Sketches, composed in 1959, and for this reason as well as for parallels of structure has been compared to Beethoven's Pastorale Symphony (Pollack 1982, 133).