I.

Introduction

Piano (musical instrument), stringed keyboard musical instrument, derived from the harpsichord and the clavichord. Also called the pianoforte, it differs from its predecessors principally in the introduction of a hammer-and-lever action that allows the player to modify the intensity of sound by the stronger or weaker touch of the fingers. For this reason the earliest known model (1709) was called a gravicembalo col piano e forte (Italian for “harpsichord with soft and loud”). It was built by Bartolomeo Cristofori, a harpsichord maker of Florence, Italy, who is generally credited with inventing the piano. Two of his pianos still exist. The case of one, dated 1720, is in the Metropolitan Museum of Art, New York City; the other, dated 1726, is in a museum in Leipzig, Germany.