The Orchestral Suite in G minor, BWV 1070 is a work by an unknown composer. It is part of the Bach-Werke-Verzeichnis catalogue (BWV catalogue) of the works of Johann Sebastian Bach, and sometimes called the "Orchestral Suite No. 5", but was almost certainly not composed by him. It is more likely that the composer was his son Wilhelm Friedemann Bach. It is a French suite with an overture and several dances, which has a similar structure to the 4 orchestral suites known to have been written by J. S. Bach. Evidence for its not being by the older composer includes the form of the opening movement, which differs from that used in the suites known to be by him, and the fact that the third movement is in a different key to the rest of the work, whereas J. S. Bach's suites are homotonal.