Edson Tadeu Ortolan wrote:

>The tonalities of the century 17 to middles of the 18 were little:
>until four sharps (E Major) and four flats (A b Major).  Theoretical
>controversies, construction difficulty and tuning of the instruments,
>and temper were the problems.  Only J.S.  Bach and J.Ph.  Rameau ("Traite
>de l'harmonie" - 1722) advanced more.  Hear:
>
>J.S. Bach: The Well-Tempered Clavier (18th century)
>F. Chopin: 24 Preludes (19th century)

If we're going w/ Chopin into the 19th century, there's also Brahms' Trio
No. 1, Op. 8.

wm