Brandenburg Concerto No. 5 the concerto to the set of "Brandenburg Concertos" in 1721 he had reworked it for a two-manual harpsichord, expanding the accompaniment with an additional cello part. Because of the limited input of the violin and flute solo parts, as compared to that of the harpsichord, the concerto can be seen as a harpsichord concerto, moreover, the first harpsichord concerto ever written. Nonetheless, the structure of the concerto and the soloist material of the harpsichordist are greatly indebted to violin concertos such as Vivaldi's "Grosso mogul" (which Bach had transcribed for organ, BWV 594) and Johann Ernst of Saxe-Weimar's G major
Keyboard concertos by Johann Sebastian Bach timing matched the publication of the first ever collection of keyboard concertos, the widely acclaimed and well-selling Organ concertos, Op.4 of George Frederic Handel published in London and Paris in 1738. The harpsichord concertos were composed in a manner completely idiomatic to the keyboard (this was equally true for those written for two or more harpsichords). They were almost certainly originally conceived for a small chamber group, with one instrument per desk, even if performed on one of the newly developed fortepianos, which only gradually acquired the potential for producing a louder dynamic. The keyboard writing also conforms to a