Alexandr Ivanovich Vvedensky (Russian: ????????? ???????? ??????????) (August 30, 1889 – July 26, 1946) was one of the leaders of the Living Church movement (????? ???????, also known as the Renovationist Church, ?????????????? ???????), a movement of the Russian Orthodox Church from 1922-1946 to reform the Russian Church life; he is considered the person "most identified with renovationism in the Soviet era" and is considered a heretic by the Russian Orthodox Church.
He should not be confused with the Russian poet of the same name.