The Berlin Society of Friends of Natural Science, (Gesellschaft Naturforschender Freunde zu Berlin, in German) (GNF) is a scientific society founded in 1773.
Apart from the Danziger Naturforschenden Gesellschaft, it is the oldest private natural society in Germany. At its foundation it had numerous prominent and influential members who were experts in the natural sciences - biologists in particular. The society exists still, and has its seat at the Institute for Zoology of the Free University of Berlin.
Early Members
References
Berlin Society of Friends of Natural Science Wikipedia(Text) CC BY-SA