Marie-Emmanuelle Bayon Louis (1746–1825) was a French composer, pianist, and salonnière. The Norton/Grove Dictionary of Women Composers credits her for making the fortepiano

Fortepiano

Fortepiano designates the early version of the piano, from its invention by the Italian instrument maker Bartolomeo Cristofori around 1700 up to the early 19th century. It was the instrument for which Haydn, Mozart, and the early Beethoven wrote their piano music...

 popular in France. In 1770 she married the architect Victor Louis

Victor Louis

Victor Louis was a French architect, winner of the Prix de Rome in 1755.Louis was responsible for the Grand Théâtre de Bordeaux of 1780 and the galleries of the Palais-Royal in Paris. A full biography was published in Bordeaux in 1881. In 1770 he married the pianist and composer .-References:...

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Published Works (Selective)

Six sonates, op.1. Paris, Vendôme, 1769 (facsimile ed., New York: Da Capo Press, 1990).

Fleur d’épine, full score. Paris, 1776. Excerpts, ed. D. Hayes, in Women Composers: Music Through the Ages (12 vols; New York: G. K. Hall/Macmillan, 1995- ), vols. 4 and 5.