John Sholto Douglas, 9th Marquess of Queensberry (20 July 1844 – 31 January 1900) was a British nobleman of the Victorian era, remembered for his atheism, his outspoken views, his brutish manner, for lending his name to the "Queensberry Rules" that form the basis of modern boxing, and for his role in the downfall of the Irish author and playwright Oscar Wilde.
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