The Astati were a Paulician sect in the 9th century, the followers of Sergius. They prevailed much under Emperor Nicephorus I, but later, under Michael I Rhangabes, they were curbed with very severe laws.
References
References
- This article incorporates text from a publication now in the public domain: Chambers, Ephraim, ed. (1728). "Astati". Cyclopædia, or an Universal Dictionary of Arts and Sciences (1st ed.). James and John Knapton, et al.