Who 'invented' the Grand Piano??? When? How many keys???

Answer 1

In 1709, Bartolommeo Cristofori invented the piano. The only information that exist indicates that the 1722 Cristofori piano ran C to C with forty-nine notes in all.
From the Organ to the Piano
The organ, the oldest keyboard instrument, has been played for several centuries, but it is a wind keyboard, and is almost entirely unrelated to the piano.The first keyboard instrument that used strings, the clavichord, came to be in the late Middle Ages, although nobody knows exactly when it was invented.The next keyboard instrument, chronologically, was the harpsichord, probably invented in the 15th century in Italy. The third type of stringed keyboard instrument is the virginal, also called the spinet. The virginal was an instrument used in the 15th, 16th and early 17th centuries, Around the turn of the 18th century, composers and musicians were looking for a new kind of keyboard instrument, when the pianoforte (today known as the piano) was invented at the turn of the 1709 by Bartolommeo Cristofori, curator of musical instruments for the Medici family. He called his invention a gravicembalo col piano e forte-a "keyboard instrument that can be played soft and loud." This name was shortened to "pianoforte," (soft-loud), then "fortepiano" and eventually to just "piano." In 1863, Henri Fourneaux invented the player piano, a kind of piano which "plays itself" without the need for a pianist. Also in the 19th century, toy pianos began to be manufactured.
TRIVIA: The first stringed instrument was the harp, on which the strings are plucked.

Answer 2

Probably Bartolomeo Cristofori of Florence, in 1722. I don't know if it had fewer keys than the modern piano.

Answer 3

The same number of keys as a baby grand or a spinet or an upright!

Answer 4

yeah i know. he is grandfather of the person who invented piano.