The Synodic Act on the heretic of Armenia, the monk Martin (Church Slavonic: Собо́рное дҍѧ́нїе на єретика́ армѧни́на, на мни́ха марти́на) is a forged document (act) created at the beginning of the 18th century by Dimitry of Rostov shortly before his death to be used against the Old Rite, and it was actively used by the missionaries of the Russian Orthodox Church during the in an attempt to convert the Old Believers. The main character of the Synodic Act is Martin Armenin or Martin the Armenian - a heretic and a monk. Martin Armenin was included as the name of a true person in many authoritative historical monographs and in liturgical texts by the Russian Orthodox Church.