These are some pieces I have studied in either music theory or music history that I continue to listen to. The first two are from extensively popular composers and most likely know world wide.
1. Debussy: La Cathedrale Engloutie (The Engulfed Cathedral)
2. Igor Stravinsky: Le Sacre du Printemps ( The Rite of Spring)
3. Hector Berlioz: Symphony Fantastique (Dream of a Witches Sabbath) – conducted by Leonard Bernstein