Brandenburg Concertos

The Brandenburg Concertos are a set of concertos written by Johann Sebastian Bach. It was written for Christian Ludwig, Magrave of Brandenburg-Schwedt.
History.
The set was collected and given to the margrave by Bach in 1721. At that time, he was working as Kapellmeister at Cöthen. Christoph Wolff thinks that the concertos may have been written when Bach was working at Weimar.