Johann Anton André (October 6, 1775, Offenbach am Main – April 6, 1842, Offenbach am Main) was a German composer and music publisher best known for his central place in Mozart research. André wrote operas, symphonies, masses, and lieder, as well as an unfinished Lehrbuch der Tonsetzkunst (Textbook of the Art of Composition) in two volumes. In 1799, André purchased a large volume of Mozart's musical papers (the Mozart-Nachlass) from the composer's widow Constanze, and brought them to Offenbach. This collection contained over 270 autographs and included the operas The Marriage of Figaro and The Magic Flute, a series of string quartets and string quintets, several piano concertos, and Eine kleine Nachtmusik. Based on these autographs, the André publishing house (founded in 1774 by André's fat