Elton John, Art Tatum, Ruth B, Alec Benjamin, and Brendon Urie.
The piano was invented in the early 18th century at a time when the harpsichord - a similar instrument in which the strings are plucked instead of hit with a hammer - was the instrument of choice. The piano was invented by Bartolomeo Cristofori. Cristofori was a harpsichord manufacturer and was enlisted by the Prince of Tuscany, Ferdinando de’Medici, to maintain his vast assortment of instruments. It is believed that Ferdinando had other motives behind Cristofori’s employment, (that he would become his own instrument inventor). Cristofori fulfilled this role by the inception of the piano. While it was much like the harpsichord, it allowed for more control over the sound and dynamics of the instrument.
To properly maintain the sound and quality of your piano, you must take into consideration factors that wouldn't normally affect other possessions, such as temperature and humidity. Extreme humidity or temperature can lead to the strings of the piano becoming warped and will make it much more difficult to tune. Additionally, covering the keys when not in use, keeping liquids away from it, and playing your piano frequently all help to ensure the health of your piano.
Weighted keys allow for much more nuance and dynamic to be added to the sound of the instrument. I had someone describe playing unweighted keys on a key board is like playing tennis with a balloon.
The sustain pedal: Allows the notes to resonate for a longer period of time before dissipating.
The Sostenuto pedal: Sustains notes that were hit during the initial use of the pedal but not the notes played after
The Una Corda pedal: This pedal makes all notes sound softer because the pedal only hits 2 of the 3 strings of the note rather than all 3
The Piano lid helps to protect the inner workings of the piano but can be raised during use to provide insight into the inner workings of the sound