"Bach's 'Air on the G String'" is a famous piece of music originally composed as part of his Orchestral Suite No. 3 in D major, BWV 1068. The piece is known for its serene and flowing melody, which is often played on the violin and is particularly popular in classical music performances. The title refers to the arrangement made by the violinist August Wilhelmj, who transcribed the piece for solo violin and piano, allowing it to be played on the G string of the violin. This adaptation has contributed to its enduring popularity and recognition in various settings, including weddings and films.