American coloratura soprano (1929-2007), very famous between the 50's and the 70's, she became the general manager of the New York City Opera, chairwoman of the Lincoln Center and the Met Opera. Signed poster of the world premiere of La Loca, opera by Italian-American composer Giancarlo Menotti (1911-2007), dated in 1979 at the San Diego Opera. The opera was composed with her in mind for the title role. Signed by Sills and by the artist Gerrit Greve, who designed the poster. Size is 22 x 38 inches, mounted on hard cardboard. Sill´s signature is a bit faded but still clearly visible, in very good condition.
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