Frederick was imprisoned by the Sultan of Aceh in northern Sumatra, but made good use of his two years in prison by studying the local Malay language and making astronomical observations.
Frederick the Great | Frederick | Frederick II | Frederick II, Holy Roman Emperor | Frederick Russell Burnham | Frederick Roberts, 1st Earl Roberts | Frederick Law Olmsted | Frederick I, Holy Roman Emperor | Frederick Forsyth | Frederick Douglass | Frederick, Maryland | Prince Frederick, Duke of York and Albany | Frederick III | Frederick I | Frederick Delius | Frederick William III of Prussia | John Frederick II, Duke of Saxony | Frederick III, German Emperor | Frederick William IV of Prussia | Frederick Schomberg, 1st Duke of Schomberg | Frederick I, Margrave of Brandenburg-Ansbach | Frederick III, Holy Roman Emperor | Frederick, Prince of Wales | Frederick Funston | Frederick Ashton | John Frederick II | Frederick Wiseman | Frederick Marryat | Lord Frederick Cavendish | Frederick Pollock |
Twelve were observed by Dutch navigators Pieter Dirkszoon Keyser and Frederick de Houtman in the end of sixteenth century and depicted by Johann Bayer in his star atlas Uranometria of 1603.