The ascetic moralist (*)
Paganism within this region is the subject of the most famous research by Ronald Hutton. A heresy from this region that was promoted by Caelestius taught that original sin did not alter man's nature and that humans could freely choose between good and evil without God; that heresy from here was condemned at the 412 Council of Carthage. A religious history of this region by Gildas [GILL-dus] is cited in a church history of it which likens man's life to a sparrow flying in a mead hall. The ascetic moralist (*) Pelagius was from this region, which in 602 received a Roman prior named Augustine as an evangelist. An "Ecclesiastical History" of this region was written in the 8th century by the Venerable Bede. For 10 points, name this region where the Anglo-Saxons were Christianized.
Paganism within this region is the subject of the most famous research by Ronald Hutton.
(Great) Britain [or Britannia; or British Isles; accept England specifically] 