Gunther Schuller, who passed away recently, was a Pulitzer winning composer from which country?

Gunther Schuller was an American composer, conductor, horn player, author, historian and jazz musician. As a composer, Mr. Schuller wrote more than 200 compositions, including solo and orchestral works, chamber music, opera and jazz. His orchestral work, “Of Reminiscences and Reflections,” dedicated to his wife Marjorie Black, won the 1994 Pulitzer Prize for Music.