Johann Sebastian Bach was not only an extremely skilled composer, but also an ingenious teacher. Even today, many piano students learn the basics of technique with his “Inventions” und “Sinfonias” and at the same time the most important elements of “classical” music. Bach called the 15 two-part pieces “Inventions” and the three-part ones “Sinfonias”. He wrote a preface to the musical text, dedicating it to “amateurs of the piano, but in particular to those who desire to learn”. Bach’s preface and a table with the most common ornaments in the “Clavierbüchlein für Wilhelm Friedemann Bach” are also reproduced in the Henle edition.