Vasily Osipovich Klyuchevsky (Russian: Василий Осипович Ключевский; 28 January [O.S. 16 January] 1841 in Voskresnskoye Village, Penza Guberniia, Russia – 25 May [O.S. 12 May] 1911, Moscow) was a leading Russian historian of the late imperial period.
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