Louis Couperin (1626–1661) was a French Baroque composer and performer. He was born in Chaumes-en-Brie and moved to Paris in 1650–1651 with the help of Jacques Champion de Chambonnières. Couperin worked as organist of the Church of St. Gervais in Paris and as musician at the court. He quickly became one of the most prominent Parisian musicians, establishing himself as a harpsichordist, organist, and violist, but his career was cut short by his early death at the age of thirty-five.

None of Couperin's music was published during his lifetime, but manuscript copies of some 200 pieces survive, some of them only rediscovered in the mid-20th century. The first historically important member of the Couperin family, Couperin made seminal contributions to the development of both the French organ school and French harpsichord school. His innovations included composing organ pieces for specific registrations and inventing the genre of the unmeasured prelude for harpsichord, for which he devised a special type of notation.

His reputation as a composer comes mainly from his chaconnes, passacaglias and unmeasured preludes. These latter pieces, written out in a unique kind of notation (whole notes only, arranged in groups and connected by graceful curves) are influenced by Froberger's free-flowing allemandes and programmatic pieces; some borrow short passages from his toccatas.

Although originally written for Organ, I created this arrangement for Concert (Pedal) Harp.