In this book the author offers us the first historical biography of Priscillian, a controversial figure of great importance for the history of the West, who until now has been considered by the different authors who have approached his figure as a heretic, reformer, apocryphal martyr or non-conformist Christian. The book also analyses the complex questions of his birthplace, the location of his burial place and the dating of the various episodes of his life, using the voices of the protagonists of the period in which Priscillian lived and making use of all the sources available to reconstruct his biography.