German sexologist known as one of the first pioneers of transgender rights. Coined the term "transvestite". Founded the Institute for Sexual Research (Institut für Sexualwissenschaft).
The Institute for Sexual Research was founded in 1919 to explore the science of sexuality, building on Hirschfeld's previous campaigns for science-backed LGBT tolerance. In 1935, the Nazis burned it to the ground and destroyed all its documents.
Magnus Hirschfeld - Wikipedia
"This Day in Jewish History: The 'Einstein of Sex' Is Born (And Dies)" - Haaretz
"100 years ago, Germany’s ‘Einstein of Sex’ began the gay rights movement"