Histoire de l'hérésie des Albigeois, et de la sainte guerre entreprise contre eux de l'an 1203 à l'an 1218

A partisan monk's chronicle offers an eyewitness account of the rise and spread of a heterodox movement in southern France, the Church's preaching and admonitions, and the armed campaign mounted against its adherents. It describes the recruitment of crusaders, sieges, battles, public punishments and massacres, and numerous local incidents and anecdotes that illuminate the period's moral atmosphere. The narrative is marked by fervent bias in favor of the crusading leaders, emphasizing their successes and motives while downplaying internal disputes among their ranks and the perspectives of those labelled heretics.