Jacob Theodor Klein

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.

Klein was born on 15 August 1685 in Danzig (Gdańsk) in Poland. Klein studied natural history and used his position as the secretary of the city to found a botanical garden there (now called Ogród Botaniczny w Oliwie). His son-in-law was Daniel Gralath, a physicist who would become mayor.

Klein dealt with small matters of zoological nomenclature and set up his own system of classification of animals, which was based on the number, shape, and position of the limbs. For his work in the field of natural science, Klein had been awarded the membership of several scientific societies, including the Royal Society in London and the Danzig Research Society. He was also a correspondent of the Lutheran pastor Friedrich Christian Lesser. He died 27 February 1759 in Königsberg, Prussia (now Kaliningrad, Russia).

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