The 1700's Timeline of the Piano

Bartolomeo Cristofori's "New Invention"

1700

"New invention" of the piano e forte recorded, Florence, Italy.
(http://biography.yourdictionary.com/bartolomeo-cristofori)

The First Upright Piano

1739

Domenico del Mela builds the earliest known upright piano in Gagliano, Italy.
(https://medium.com/@Rufusboy1428/the-piano-a7fdff5e8d22)

Pianos Advertised for Sale in France

1750

http://www.concertpitchpiano.com/TimeLine.html

First Public Piano Performance in Paris

1768

https://www.piano-tuners.org/history/history_1.html

Creation of the 6-Octave Grand Piano

1796

Broadwood Makes a 6-Octave Grand for the Queen of Spain, London
(https://www.bostonglobe.com/arts/theater-art/2014/01/20/piano-with-grand-history-mfa/NDkSzoTRgWE8dkqy1K19IK/story.html)