Grand piano is an instrument with over 300 years of history. It is the youngest from classical instruments. However, it has a long and colorful history.
The scale of the first pianos built by Bartolomeo Cristofori included only 4 and 1/2 of octaves from great C to f3. Half of the eighteenth century gave expansion the scale to five octaves. Another great builder of pianos – Sebastien Erard – built pianos with 6 octaves. At this type of instrument played e.g. Ludwig Van Beethoven.
Currently, grand pianos and upright piano have scales of 7 and 1/4 octaves (88 keys). However, there are pianos built by the company Bösendorfer with scale of 7 and 3/4 octaves (92 keys), and what is more interesting – piano Bösendorfer 290 Imperial Modell has 8 octaves (97 keys).