Transgender history dates back to the first recorded instances of transgender individuals in ancient civilizations. However, the word transgenderism did not exist until 1965 when coined by psychiatrist John F. Oliven of Columbia University in his 1965 reference work Sexual Hygiene and Pathology; the timeline includes events and personalities that may be viewed as transgender in the broadest sense, including third gender and other gender-variant behavior, including ancient or modern precursors from the historical record.

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