Air on a G String is an arrangement for the violin from Johann Sebastian Bach’s Orchestral Suite No. 3 in D major. Bach originally wrote the suite for Prince Leopold of Anhalt in the early 18th century. It only became known as Air on a G String in 1871 when the German violinist August Wilhelmj made a violin and piano arrangement of the second movement of this orchestral suite. By changing the key into C major and transposing the melody down an octave, Wilhelmj was able to play the piece entirely on the G string of his violin.