Every Sunday Telemann had to perform a church cantata and several Passion recitals, as well as one Passion oratorio every year. For the festive season he was required to deliver a composition for each and every holy day. In the 15 years he was there, during which he also directed the opera, he composed about 20 operas, as well as other music for large ensembles. In spite of his immense productivity, the quaIity of his work remained unaffected, and he was still able to create beautiful gems such as the Moral Cantatas and the solos for baroque flute, violin and vioI. The cantatas served the musical cultivation of the Hamburg bourgeoisie and reflected a contemporary concern; the improvement of morals and the search for the joys of Iife as a consequence of modesty, reason, tolerance and a moral rectitude with regard to other people, in the sense of the philosophy of EnIightenment.