Bach cantata cantatas are assumed to date from this period: Bach worked in Weimar from 1708. He composed a secular cantata Was mir behagt, ist nur die muntre Jagd, BWV 208 in 1713. The composition of cantatas for the (court chapel) on a regular monthly basis started with his promotion to in March 1714. His goal was to compose a complete set of cantatas for the liturgical year within four years. Cantatas 54 and 199 were performed within the cycle but possibly composed earlier. Bach worked in Köthen from 1717 to 1723, where he composed for example the "Brandenburg concertos". He had
Brandenburg the Province of Brandenburg, again subdivided into the government regions of Frankfurt and Potsdam. In 1881, the City of Berlin was separated from the Province of Brandenburg. However, industrial towns ringing Berlin lay within Brandenburg, and the growth of the region's industrial economy brought an increase in the population of the province. The Province of Brandenburg had an area of and a population of 2.6 million (1925). After World War II, the Neumark, the part of Brandenburg east of the Oder–Neisse line, was transferred to Poland; and its native German population expelled. The remainder of the province became a state