Frankfurt Zoological Society (FZS) is an international conservation organization founded in 1858 with headquarters in Frankfurt am Main, Germany. FZS focuses on maintaining biodiversity and conserving wildlife and ecosystems in protected areas and outstanding wild places. FZS leads and supports about 30 projects in 18 countries. Bernhard Grzimek, renowned German zoo director, zoologist, book author, editor, and animal conservationist in postwar West-Germany, served as president of the Frankfurt Zoological Society for over forty years.