French composer, organist and harpsichord player who inherited the position of his father at St. Gervais. Through his musical children he was able to maintain simultaneous positions at St. Barthelemy, St. Jean-en-Greve, Sainte-Chapelle, Notre-Dame and Carmes Billettes as well. Compositions, most notably for the harpsichord, included sonatas, variations, and other miscellaneous forms. Couperin's "Les quatre nations" is the only piece of musical literature that requires two harpsichords with knee-levers. ~ Keith Johnson, All Music Guide