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
Jack Brandenburg a member of the board of the Huron-Clinton Metro Parks Authority. Brandenburg and his wife Karen Linenger are the parents of four children. Brandenburg is a Roman Catholic. Jack Brandenburg Jack Brandenburg (born October 22, 1951) is a Republican Michigan state senator. He was elected to office in 2010. Previously he had served for six years as a member of the Michigan House of Representatives and a member of that body's appropriations committee. Brandenburg was born in Canton, Ohio. He has a bachelor's degree from Ashland University. Brandenburg is a businessman who founded and owns Blue Water Industrial Supply, a