archpriest, leader of the Old Believers (Old Believer), conservative clergy who brought on one of the most serious crises in the history of the Russian church by separating from the Russian Orthodox church to support the “old rite,” consisting of many purely local Russian developments. He is also considered to be a pioneer of modern Russian literature.

In 1652 he went to Moscow and joined in the struggle against Patriarch Nikon, whose high-handed methods and brutal treatment of dissidents made unpopular his reforms of adopting Greek Orthodox church customs in an effort to unite the entire Orthodox church. Under Nikon's regime, Old Believers were excommunicated and severely persecuted. Avvakum himself was twice banished and finally imprisoned. It was during his imprisonment in Pustozersk that he wrote most of his works, the greatest of which is considered to be his Zhitiye (“Life”), the first Russian autobiography. Distinguished for its lively description and for its original, colourful style, the Zhitiye is one of the great works of early Russian literature. A council of 1682 against the Old Believers condemned Avvakum to be burned at the stake, and the sentence was carried out.