Dmitri Ivanovich (; 19 October 1582 – 15 May 1591), also known as Dmitry of Uglich (, Uglichskii) or Dmitry of Moscow (, Moskovskii), was the youngest son of Ivan the Terrible, Tsar of Russia. He was Russian Tsarevich and was famously impersonated by a series of pretenders after his death. Life Dmitry was the youngest son of Ivan the Terrible with his last wife Maria Nagaya (their only child). Ivan died in 1584, and was succeeded by Dmitry's older brother, Feodor I. Feodor was sickly and weak, and the country was governed by a regency council. This was headed from 1586 by the boyar Boris Godunov, Feodor's brother-in-law. In 1584, Godunov sent Dmitry, and his mother and her brothers, into internal exile in the Tsarevich's appanage city of Uglich. On 15 May 1591, Dmitry died there under mysterious circumstances. Thus when Tsar Feodor died childless in 1598, Dmitry, the only other possible Rurikid heir, was also dead, and Godunov claimed the throne. It was widely believed at the time that Godunov got rid of Dmitry to clear the way for his own eventual succession. Death theories Russian chroniclers and later historians offered two possible scenarios of what could have happened to Dmitry. The first theory is that Dmitry was killed by the order of Boris Godunov, the assassins making it look like an accident (this version was supported by the prominent 19th-century historians Nikolai Karamzin, Sergei Soloviev, Vasily Klyuchevsky and others). The critics of this version point out that Dmitry was Ivan's son from his fifth (or seventh) marriage, and thus illegitimate by Russian Orthodox canon law, which allows a maximum of three marriages. This would make any claim of Dmitry's for the throne dubious at best. The modern scholarship tends to exonerate Boris of any role in the prince's death. The second theory is that Dmitry stabbed himself in the throat during an epileptic seizure, while playing with a knife (this version was supported by historians Mikhail Pogodin, Sergei Platonov, V. K. Klein, Ruslan Skrynnikov and others). The detractors of this scenario assert that, since during an epileptic seizure the palms are wide open, the self-infliction of a fatal wound becomes highly unlikely. However, the official investigation, done at that time, asserted that the Tsarevich's seizure came while he was playing a svaika game or with a knife (v tychku) and thus holding the knife by the blade,