Some of the earliest public concerts in Germany were given in Leipzig by the Collegium Musicum, a group founded by Telemann in 1704 and run by J.S. Bach at Zimmermann’s coffee house in the 1730s.  This popular programme brings together Bach’s Brandenburg Concerto No. 1 and the Double Violin Concerto with music by Telemann and an oboe concerto by Alessandro Marcello, a work known to Bach and arranged by him for solo harpsichord.  A rarity in the first movement of Brandenburg Concerto No. 3 in the composer’s sumptuous later arrangement with the addition of three oboes, two horns and bassoon to the nine-part string ensemble.