Priscillianism

Priscillianism was an ascetic Christian movement founded in Hispania in the later 4th century by Priscillian, a layman who became bishop of Ávila. It stressed asceticism, the study of apocryphal writings and the role of lay teachers, and was attacked as heretical by bishops including Ithacius of Ossonoba. Priscillian was executed at Trier in about 385, the first Christian put to death for heresy, but the movement persisted in Gallaecia into the 6th century.