Only about 20 independent concerts by Johann Sebastian Bach have survived completely. Measured by Bach’s entire œuvre and also compared to other great composers of his time, this is quite a small number. Moreover, half of the concerts are arrangements of works both of himself and others. These include also the Harpsichord Concerto in A minor BWV 1065 which is based on Antonio Vivaldi’s Concerto for 4 Violins Op. 3/10.

It is believed that Bach wrote his concert music for events of the Leip...