Harpsichords. The harpsichord was most likely invented in the late Middle Ages. By the 16th century, harpsichord makers in Italy were making lightweight instruments with low string tension. A different approach was taken in the Southern Netherlands starting in the late 16th century, notably by the Ruckers family. Their harpsichords used a heavier construction and produced a more powerful and distinctive tone. They included the first harpsichords with two keyboards, used for transposition.
The Flemish instruments served as the model for 18th-century harpsichord construction in other nations. In France, the double keyboards were adapted to control different choirs of strings, making a more musically flexible instrument. Instruments from the peak of the French tradition, by makers such as the Blanchet family and Pascal Taskin, are among the most widely admired of all harpsichords, and are frequently used as models for the construction of modern instruments. In England, the Kirkman and Shudi firms produced sophisticated harpsichords of great power and sonority. German builders extended the sound repertoire of the instrument by adding sixteen foot and two foot choirs; these instruments have recently served as models for modern builders.
The harpsichord was widely used in Renaissance and Baroque music. During the late 18th century, with the rise of the piano, it gradually disappeared from the musical scene. In the 20th century, it made a resurgence, being used in historically informed performances of older music, in new compositions, and in certain styles of popular music. Reference: Wikipedia