Hans Ludwig Raimund von Koester was a German naval officer who served in the Prussian Navy and later in the Imperial German Navy. He retired as a Grand Admiral.
Hans von Koester
König Wilhelm in 1890
Grand admiral is a historic naval rank, the highest rank in the several European navies that used it. It is best known for its use in Germany as Großadmiral. A comparable rank in modern navies is that of admiral of the fleet.
Image: Prince Henry of Prussia (1862–1929), brother of Kaiser Wilhelm II
Image: Postcard Kaiser Wilhelm II of Germany circa 1910
Image: Edward VII of the United Kingdom
Image: Koester, Admiral Hans von, Agence Rol, BNF Gallica