Organ concertos, Op. 4 (Handel) had already been established during his one-year position as cathedral organist in Halle in 1702. Handel's organ concertos thus have a special place in his oeuvre. They paved the way for Mozart and Beethoven, who like Handel achieved fame in their lifetimes as composers and performers of their own concertos. In the sinfonias of some of his cantatas, Johann Sebastian Bach had already introduced concerto movements for organ and orchestra. However, Bach's organs in both Weimar and Leipzig were large organs with double keyboards and pedals, powerful instruments that could only dominate a baroque orchestra. Bach's organ writing in the
Oberliga Berlin-Brandenburg each who would determine their champions in a home-and-away format. The two divisional champions would then play for the Brandenburg championship in a two-game series. Should each team win one game, a third game was held as a decider. The Brandenburg champion would then continue on to play in the German football championship. From 1925 onwards, the runners-up of Brandenburg was also qualified for an enlarged national championship. Below the league, as the second division in Brandenburg, four "Kreisligas" were set, those being: From 1925 onwards, until 1931, the league was dominated by Hertha BSC Berlin, who won it every