Margrave Christian Ludwig of Brandenburg-Schwedt Margrave Christian Ludwig of Brandenburg-Schwedt Christian Ludwig (24 May 1677 – 3 September 1734), a member of the House of Hohenzollern, was a Margrave of Brandenburg-Schwedt and a military officer of the Prussian Army. The margravial title was given to princes of the Prussian Royal House and did not express a territorial status. He is best known as the recipient of Johann Sebastian Bach's "Brandenburg concertos". Born in Berlin, Christian Ludwig was the youngest son of the "Great Elector" Frederick William (1620–1688), ruler of Brandenburg-Prussia, and his second wife Princess Sophia Dorothea of Schleswig-Holstein-Sonderburg-Glücksburg (1636–1689). Like his elder brothers, he
Hansa-Brandenburg B.I Hansa-Brandenburg B.I The Hansa-Brandenburg B.I was an unarmed military trainer and reconnaissance biplane of World War I, flown by the Austro-Hungarian Air Service. Early models were known internally to the Hansa-Brandenburg firm as the type D, while later models with a more powerful engine were designated FD. This aircraft was one of the earliest designs of Ernst Heinkel, who was working for Hansa-Brandenburg at the time. It was an entirely conventional two-bay biplane with staggered wings of unequal span. The pilot and observer sat in tandem in a long open cockpit. The aircraft was produced under license by Aero, both