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Magnus Hirschfeld is born to Hermann and Friederike Hirschfeld in Kohlberg, Pomerania.
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Hirschfeld completes his studies at Friedrich-Wilhelm University and defends his dissertation, graduating with his M.D.
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Hirschfeld opens his first medical practice in Magdeburg; he treats his patients using naturopathy.
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Hirschfeld publishes "Sappho and Socrates, How can one explain the love of men and women for people of their own sex?" with publisher Max Spohr under the pseudonym Th. Ramien.
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Hirschfeld establishes the Scientific-Humanitarian Committee (Wissenschaftlich-humanitäres Komitee, WhK).
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Hirschfeld publishes his landmark research in "Transvestites: The Erotic Drive to Cross-Dress".
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The Scientific-Humanitarian Committee collaborates with various women's groups following a proposal to criminalize female homosexuality.
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Hirschfeld establishes the Medical Society for Sexology, where he creates the Journal for Sexology.
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Between 1914 and 1919, Hirschfeld meets Karl Giese, his second-in-command in his research and likely his romantic partner.
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Hirschfeld served as a doctor for the German Red Cross during World War I, after which he joins the Pacifist League for a New Fatherland.
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Hirschfeld opens the Institute of Sexual Science (Institut für Sexualwissenschaft) in Berlin.
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The film "Different From the Others" is released in Germany, featuring Hirschfeld as himself. The film was created to normalize and sympathize homosexual men in the eyes of the German public.
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Hirschfeld is beat to near death in Munich by antisemites.
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Hirschfeld hands ownership of the Institute to the state, officially making the building a public service for Germans
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Hirschfeld departs on a tour around the United States, choosing to extend the tour to Asia shortly after. The tour is extended indefinitely due to mounting antisemitism in Germany with the rise of the Nazi Party.
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While on his world tour, Hirschfeld meets Li Shiu Tong, a Chinese student who attended one of his lectures. Li, who Hirschfeld referred to as "Tao Li," became his translator and tour guide through China, eventually becoming Hirschfeld's protégé and perhaps romantic partner.
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National Socialist university students ransack the Institute of Sexual Science, burning most of the research and auctioning off the remainder of the Institute's artifacts.
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Hirschfeld dies in his exile in Nice, France of a heart condition.