What is "priscillian"

Priscillian (died c.385) was a wealthy nobleman of Roman Hispania who promoted a strict form of Christian asceticism. He became bishop of Ávila in 380. Certain practices of his followers (such as meeting at country villas instead of attending church) were denounced at the Council of Zaragoza in 380. Tensions between Priscillian and bishops opposed to his views continued, as well as political maneuvering by both sides. Around 385, Priscillian was charged with sorcery and executed by authority of the Emperor Maximus. The ascetic movement Priscillianism is named after him, and continued in Hispania and Gaul until the late 6th century. Tractates by Priscillian and close followers, which had seemed lost, were discovered in 1885 and published in 1889.