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
Hansa-Brandenburg B.I Hansa-Brandenburg B.I The Hansa-Brandenburg B.I was an unarmed military trainer and reconnaissance biplane of World War I, flown by the Austro-Hungarian Air Service. Early models were known internally to the Hansa-Brandenburg firm as the type D, while later models with a more powerful engine were designated FD. This aircraft was one of the earliest designs of Ernst Heinkel, who was working for Hansa-Brandenburg at the time. It was an entirely conventional two-bay biplane with staggered wings of unequal span. The pilot and observer sat in tandem in a long open cockpit. The aircraft was produced under license by Aero, both