Keyboard concertos by Johann Sebastian Bach 1059) which adds an oboe to the strings and continuo. Most of Bach's harpsichord concertos (with the exception of the 5th "Brandenburg Concerto") are thought to be arrangements made from earlier concertos for melodic instruments probably written in Köthen. In many cases, only the harpsichord version has survived. They are among the first concertos for keyboard instrument ever written. The earliest extant sources regarding Bach's involvement with the keyboard concerto genre are his Weimar concerto transcriptions, BWV 592–596 and 972–987 (), and his fifth "Brandenburg Concerto", BWV 1050, the early version of which, BWV 1050a, may have originated before Bach
Margraviate of Brandenburg throne, as they already held the vote of Bohemia. Charles succeeded in purchasing Brandenburg from Margrave Otto for 500,000 guilders in 1373 and, at a in Guben, he attached (but not incorporated) Brandenburg to the Crown of Bohemia. The "Landbuch" ("land book", i.e. estate register) of Charles IV, a source for the history of medieval settlement in Brandenburg, originated during this time. Charles chose the castle of to be the electoral residence. The power of the Luxembourgs in Brandenburg declined during the reign of Charles's nephew Jobst of Moravia. The was pawned to the Teutonic Knights, who neglected the border