Priestess of Avalon is a 2000 novel by American writer Marion Zimmer Bradley, completed posthumously by Diana L. Paxson. It follows detailing the life of Helena, first wife of Western Roman Emperor Constantius Chlorus and mother of Constantine. Wikipedia
Originally published: November 6, 2000
Authors: Diana L. Paxson and Marion Zimmer Bradley
Preceded by: Lady of Avalon and Marion Zimmer Bradley's Ravens of Avalon
Followed by: The Mists of Avalon and Lady of Avalon
Genres: Fantasy Fiction, historical novel, Historical fantasy, and more
Series: Avalon Series