Apart from his orchestral keyboard concertos and his solo organ concertos, Johann Sebastian Bach composed keyboard concertos for unaccompanied harpsichord: * Most of his Weimar concerto transcriptions, over twenty arrangements of Italian and Italianate orchestral concertos which he produced around 1713–1714 when he was employed in Weimar, were written for solo harpsichord (BWV 592a and 972–987). * Two decades later, some ten years after he had become Thomaskantor in Leipzig, he wrote a concerto for two harpsichords, BWV 1061a, which was later orchestrated as BWV 1061. * The Italian Concerto, BWV 971, was published in 1735 as part of his Clavier-Übung II.