Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Johann Anton André was a German composer and music publisher. André wrote operas, symphonies, masses, and lieder, as well as a still unfinished Lehrbuch der Tonsetzkunst in two volumes. In 1799, André purchased a large volume of Mozart's musical papers from his 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.