ABSTRACT
During his Weimar years Bach made keyboard versions of some twenty concertos by various composers. Th e originals were mostly by Italian (more precisely, Venetian) composers, including Vivaldi and Benedetto Marcello. But they also included at least one work by Telemann and three by the talented young Prince Johann Ernst of Sachsen-Weimar.1 Th e composers of three works are unknown. Five arrangements are for organ, with pedal; sixteen or seventeen are manualiter and are generally assumed to be for harpsichord. Two concertos exist in both manualiter and pedaliter versions.
