Tracing the roots of the piano to the very beginning of consciousness, when man first became aware of sound.
1200, Chifonie

of Alfonso X the Wise,
Codex de El Escorial, 1221-1284. 1
The chifonie (or symphonia), a modified hurdy-gurdy (and variant of the solo organistrum), refined into a portable, single player instrument, and predominantly used for secular music.
Page Sources
SOURCES
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[1]
Grosasm. "Symphonia de Cantiga 160, Cantigas de Sta. María de Alfonso X El Sabio, Códice de El Escorial (1221-1284), photographed by G. Rosa." Photograph. Commons Wikiemdia. Wikimedia Foundation, Inc., 17 Oct. 2006. Web. 9 Oct. 2015. GFDL, and CC BY-SA 3.0.
[2]
Michautable. "Chifonie Médiévale." Online Video Clip. YouTube. YouTube, 17 March 2014. Web. 14 Oct. 2015. Standard YouTube License.