The Protestant pastor Leopold Erdmann Emanuel Felke was a naturopath who developed the eponymous Felke cure, and who was active in Repelen near Moers from 1896 to 1914 and in Bad Sobernheim from 1915 to 1925. He also practiced iris diagnosis (iridology) and is considered the co-father of combination homeopathic remedies.

Bad Sobernheim is a town in the Bad Kreuznach district in Rhineland-Palatinate, Germany. It belongs to the like-named Verbandsgemeinde, and is also its seat. It is a state-recognized spa town, and is well known for two fossil discovery sites and for the naturopath Emanuel Felke. Bad Sobernheim is also a winegrowing town.