The Inventions and Sinfonias, BWV 772–801, also known as the Two- and Three-Part Inventions, are a collection of thirty short keyboard compositions by Johann Sebastian Bach (1685–1750): 15 inventions, which are two-part contrapuntal pieces, and 15 sinfonias, which are three-part contrapuntal pieces. They were originally written as musical exercises for his students.

Date of composition 1723 (1720–23)
First published 1801
Type Invention
Tonality B Minor
Catalogue BWV 786
Instruments Keyboard
Links
Autotranslations beta Jean-Sébastien Bach: Invention n°15 en si mineur, BWV 786
Johann Sebastian Bach: Invenzione n. 15 in si minore, BWV 786
Johann Sebastian Bach: Invention Nr. 15 h-moll, BWV 786