Jesus nahm zu sich die Zwölfe, BWV 22 Weimar did not dismiss him and arrested him for disobedience. He was released on 2 December 1717. In Köthen, Bach found an employer who was an enthusiastic musician himself. The court was Calvinist, therefore Bach's work from this period was mostly secular, including the orchestral suites, the cello suites, the sonatas and partitas for solo violin, and the "Brandenburg Concertos". He composed secular cantatas for the court for occasions such as New Year's Day and the prince's birthday, including . He later parodied some of them as church cantatas without major changes, for example . Bach composed his cantata as
Brandenburg Concertos of silver. The autograph manuscript of the concertos was only rediscovered in the archives of Brandenburg by Siegfried Wilhelm Dehn in 1849; the concertos were first published in the following year. The manuscript was nearly lost in World War II, when being transported for safekeeping to Prussia by train in the care of a librarian. The train came under aerial bombardment, and the librarian escaped the train to the nearby forest, with the scores hidden under his coat. In the modern era these works have been performed by orchestras with the string parts each played by a number of players,