Brandenburg the University of Potsdam, located southwest of Berlin. The "Brandenburg concerti" by Johann Sebastian Bach (original title: "Six Concerts à plusieurs instruments") are a collection of six instrumental works presented by Bach to Christian Ludwig, Margrave of Brandenburg-Schwedt, in 1721 (though probably composed earlier). They are widely regarded as among the finest musical compositions of the Baroque era and are among the composer's best known works. Brandenburg Brandenburg (; , Lower Sorbian: "Bramborska", ) is a state of Germany. Brandenburg is located in the northeast of Germany covering an area of and has a population of 2.5 million residents, the
Brandenburg-Prussia the Catholic-Imperial camp in the Treaty of Königsberg (1627) and accept garrisons. When the Swedish Empire entered the war and advanced into Brandenburg, George William again claimed neutrality, yet Gustavus Adolphus of Sweden compelled George William to join Sweden as an ally by occupying substantial territory in Brandenburg-Prussia and concentrating an army before the town walls of Berlin. George William did not conclude an alliance, but granted Sweden transit rights, two fortresses and subsidies. Consequently, Roman Catholic armies repeatedly ravaged Brandenburg and other Hohenzollern lands. During the Thirty Years' War, George William was succeeded by Frederick William, born 1620, who