1552-1605. Tsar of Russia from 1598. He was assassinated by a pretender to the throne. The legend that has grown up around this forms the basis of Pushkin's play Boris Godunov 1831 and Mussorgsky's opera of the same name 1874. Boris Godunov was elected after the death of Fyodor I, son of Ivan the Terrible. He died during a revolt led by one who professed to be Dmitri, a brother of Fyodor and the rightful heir. The true Dmitri, however, had died in 1591 by cutting his own throat during an epileptic fit. An apocryphal story of Boris killing the true Dmitri to gain the throne was fostered by Russian historians anxious to discredit Boris because he was not descended from the main ruling families. Godunov's rule was marked by a strengthening of the Russian church, but was also the beginning of the Time of Troubles, a period of instability.