Prussian scholar (1685-1759).
Jacob Theodor Klein (nickname Plinius Gedanensium; 15 August 1685 – 27 February 1759) was a German jurist, historian, botanist, zoologist, mathematician and diplomat in service of Polish King August II the Strong. He established a botanical garden and menagerie in Danzig apart from setting up a cabinet of natural history known as the Museum Kleinianum which he filled with specimens collected through a wide network.