Keyboard concertos by Johann Sebastian Bach the harpsichord concertos BWV 1052, 1053 and 1059. Based on harpsichord concertos and earlier cantata movements orchestral organ concertos were reconstructed and/or transcribed and arranged. The parts from the Concerto for four harpsichords BWV 1065 (Bach's arrangement of the Concerto for Four Violins, RV 580, by Antonio Vivaldi), have been dated to around 1730. Whereas the concertos with a single harpsichord soloist were composed partly to showcase Bach's own prowess at the keyboard, the others were written for different purposes, one of them being as —music for domestic performance within the Bach household at the Thomaschule in Leipzig. Johann Nikolaus
RBB Brandenburg RBB Brandenburg RBB Brandenburg (until May 2003 ORB-Fernsehen) was the "third television channel" for Brandenburg, Germany from January 1992 to March 2004. Until May 2003, it was organized by Ostdeutscher Rundfunk Brandenburg (ORB), then by its successor, Rundfunk Berlin-Brandenburg (RBB). On 1 March 2004, the two regional television channels of RBB - "RBB Brandenburg" and "RBB Berlin" - were integrated into the new rbb Fernsehen. The programme was launched on 1 January 1992 under the name "Fernsehen Brandenburg". In the initial build-up phase, the then ARD cultural television programme Eins Plus was taken over from 3 p.m. to 5.15 p.m.