Bonacursus was a 12th-century Italian Cathar who converted to Catholicism and released a confessional report to the people of Milan exposing the nature of the Cathar heresy entitled "Manifestatio haeresis catharorum quam fecit Bonacursus" sometime between 1176 and 1190. He also reported on the Pasagian heresy as well as the Arnoldists.
References
- Wakefield, Walter Leggett; Austin P. Evans (1991). Heresies of the High Middle Ages. New York: Columbia University Press. pp. 170. ISBN 0231027435.
- Blunt, John Henry (1874). Dictionary of Sects, Heresies, Ecclesiastical Parties and Schools of Religious Thought. London Oxford and Cambridge: Rivingtons. pp. 408–9. ISBN 978-0-8103-3751-0.
- Lambert, Malcolm D. (1998). The Cathars. Blackwell Publishing. p. 84. ISBN 063120959X.