Keyboard concertos by Johann Sebastian Bach soloists, were all adapted into harpsichord concertos by the composer, BWV 1058, 1054 and 1062 respectively. It is often assumed that Bach's extant violin concertos were written in his Köthen period (1717–1723): it can however not be proven from documentary evidence that any of them existed prior to around 1730. In September 1725 Bach performed organ music, accompanied by other instruments, in Dresden. The works he performed there have not been identified. More than a year later he composed several cantatas with an organ obligato part. Several movements of such cantatas were derived from earlier lost concertos, and resurfaced in
Brandenburg Navy recognized that they could never compete directly with the great maritime powers and concentrated instead on building the best army in Europe while maintaining good relations with naval powers such as Denmark and the Netherlands. The overseas colonies were eventually sold to the Dutch in 1721. In 1701, Frederick was crowned King in Prussia, marking a shift from Brandenburg to Prussia as the most important Hohenzollern realm. The Brandenburg Navy was consequently merged into the Prussian Navy that year. List of ships in the Brandenburg Navy : Brandenburg Navy The Brandenburg Navy was the navy of the Margraviate of Brandenburg