Keyboard concertos by Johann Sebastian Bach the harpsichord concertos BWV 1052, 1053 and 1059. Based on harpsichord concertos and earlier cantata movements orchestral organ concertos were reconstructed and/or transcribed and arranged. The parts from the Concerto for four harpsichords BWV 1065 (Bach's arrangement of the Concerto for Four Violins, RV 580, by Antonio Vivaldi), have been dated to around 1730. Whereas the concertos with a single harpsichord soloist were composed partly to showcase Bach's own prowess at the keyboard, the others were written for different purposes, one of them being as —music for domestic performance within the Bach household at the Thomaschule in Leipzig. Johann Nikolaus
Brandenburg-Prussia after the victory at Fehrbellin and the Brandenburg-Prussian advance in Swedish Pomerania during the Scanian War, Frederick William decided to establish a navy. He engaged Dutch merchant and shipowner Benjamin Raule as his advisor, who after a first personal meeting with Frederick William in 1675 settled in Brandenburg in 1676 and became the major figure of Brandenburg-Prussia's emerging naval and colonial enterprise. The Brandenburg-Prussian navy was established from ten ships which Frederick William leased from Raule, and achieved first successes in the war against Sweden supporting the siege of Stralsund and Stettin and the invasion of Rügen. In Pillau (now