Matvei Semyonovich Bashkin () was a Russian boyar scion in the time of Ivan the Terrible charged with heresy for denial of the doctrine of the Trinity along with abbot Artemy the former abbot of Trinity-St. Sergius Monastery. In 1553 he organised a circle of gentry in Moscow and began to teach against the Orthodox Church. He was beaten and sentenced to imprisonment in the Joseph-Volokolamsk Monastery where he died. References Converts to Protestantism from Eastern Orthodoxy Russian Protestants Former Russian Orthodox Christians