yes i hate reading books too, i only play the piano 
It shows.

If your poll refers only to piano music, then the (more or less) accepted date for the invention of the first piano is 1709, and the first piece written explicitly for the piano is Lodovico Giustini’s “Sonata for the soft and loud harpsichord, commonly called mallet harpsichord”, dated from 1731.
However, it was only in 1768 that the piano really started catching on and displacing the harpsichord as the most popular keyboard instrument thanks to J. C. Bach (son of J. S. Bach) championing the new instrument by giving the first piano recital in London.
In the 1770s Clementi, Haydn – and most importantly – Mozart (with his piano concertos) put the last nail on the harpsichord coffin by writing specifically and exclusively for the piano. So much so that the last harpsichord was made in 1793.
So, I am sorry, but no Early piano music, no Medieval piano music, no Renaissance piano music, and mostly no Baroque piano music.

If however you mean “keyboard music” (organ, clavichord, harpsichord, virginal, spinetta, - but not the accordion – the accordion was invented in the late 19th century), then we can go back in time a bit, since it is now more or less established that the keyboard as we know it today was around at least as early as 1361.

Best wishes,
Bernhard.