Our votes on the 66th tier selected the following works:
To move up 2 to the 64th tier:
Bach: Cantata #78 "Jesu, der du meine Seele" [1724]
Chopin: Impromptus [1837, 1839, 1843], including the Fantaisie-Impromptu [1834]
Pergolesi: Stabat Mater [1736]
To move up 1 to the 65th tier:
Albinoni: Concerti a Cinque, op. 5 [1722]
Bruch: Concerto for Clarinet, Viola, and Orchestra in E minor, op. 88 [1911]
Dutilleux: Violin Concerto "L'arbre des songes (The Tree of Dreams)" [1985]
Field: Nocturnes [1812-1836]
Haydn: String Quartets, op. 50 "Prussian" [1787]
Leifs: Hekla, op. 52 [1961]
Messiaen: Catalogue d'oiseaux (Catalogue of Birds) [1958]
Paganini: 24 Caprices for Solo Violin, op. 1 [1817]
Poulenc: Dialogues des Carmélites [1956]
Reger: Piano Concerto in F minor, op. 114 [1910]
Rheinberger: Symphony #2 in F, op. 87 "Florentine" [1875]
Stockhausen: Kontakte [1958-60]
Strauss, J. II: An der schönen blauen Donau (On the Beautiful Blue Danube), op. 314 [1866]
Stravinsky: Le Chant du Rossignol (Song of the Nightingale) [1917]
Tchaikovsky: Manfred Symphony in B minor, op. 58 [1885]
Telemann: Paris Quartets [1730, 1738]
Verdi: Falstaff [1893]
To remain on the 66th tier:
Atterberg: Symphony #2 in F, op. 6 [1913]
Bernstein: Chichester Psalms [1965]
Brahms: Waltzes, op. 39 [1865]
Britten: Cello Symphony, op. 68 [1963]
Buxtehude: Jubilate Domino, BuxWV 64 [1690 or earlier]
Hartmann: Concerto funèbre [1939]
Haydn: Symphony #6 in D "Le Matin" [1761]
Kancheli: Symphony #5 "To the Memory of My Parents" [1977]
Khachaturian: Spartacus [1954]
Mompou: Musica Callada (Silent Music) [1959 to 1967]
Mozart: Adagio in B minor, K. 540 [1788]
Purcell: Come Ye Sons of Art, Away, Z. 323 [1694]
Purcell: Of old, when heroes thought it base (The Yorkshire Feast Song), Z. 333 [1690]
Rachmaninoff: Symphony #1 in D minor, op. 13 [1895]
Saint-Saëns: Violin Concerto #3 in B minor, op. 61 [1880]
Schumann: Overture, Scherzo, and Finale, op. 52 [1841]
Tchaikovsky: Pique Dame (The Queen of Spades), op. 68 [1890]
Villa-Lobos: Chôros #10 for chorus and orchestra "Rasga o coração" [1926]
Walton: Belshazzar's Feast [1931]
Yoshimatsu: Symphony #4, op. 82 [2000]
To move down 1 to the 67th tier:
Sousa: The Washington Post [1889]