Sermones Contra Hereticos presents an edition and translation of a group of mostly unpublished Latin sermons which were originally preached in the context of the Albigensian Crusade of 1226 and during the fight against heresy in northern France in 1231. The nine extant sermon texts are unique in that they can be connected to specific preaching events for which the identity of the preacher, the time, and location, as well as the audience are known. The sermons were originally preached before academics at the University of Paris, to King Louis VIII of France at the start of his crusade in Bourges, at a procession in Paris in aid of the crusade army at the siege of Avignon, for the recruitment of additional crusaders, and at an episcopal synod at Laon and to laypeople at Bruyères-et-Montbérault in an attempt to ward off the spread of heretical beliefs. These texts provide us with an opportunity to tie particular strands of crusade ideology and doctrine to specific moments of the crusade movement and to the church's endeavours to counteract heresies by intensifying pastoral preaching. In addition, the texts can tell us a great deal about the way in which oral preaching was recorded and about the differences between the surviving textual record and the historical spoken word. Preface Abbreviations Introduction Sermons against heresy preached in 1226 and 1231 by Philip the Chancellor, Eudes of Châteauroux The crusades and the fight against heresy The crusade of 1226 against the Albigensians Preaching against heresy in northern France at the beginning of the 1230s Manuscript texts and live sermons Manuscripts Principles of edition and translation Edition and Translation 1. Philip the Chancellor, Sermon preached to scholars at Paris on 18 January 1226 2. Philip the Chancellor, Sermon preached to scholars at Paris on 25 January 1226 3. Philip the Chancellor, Sermon preached to scholars at Paris on 2 February 1226 4. Philip the Chancellor, Sermon preached in front of King Louis VIII and crusaders at Bourges on 17 May 1226 5. Philip the Chancellor, Sermon preached at St. Victor in Paris during a procession in aid of King Louis VIII's siege of Avignon on 21 August 1226 6. Eudes of Châteauroux, Sermon preached for the recruitment of crusaders for the Albigensian Crusade of 1226 between February and September 1226 7. Philip the Chancellor, Sermon preached at Paris on 20 March 1231 probably to scholars of the university 8. Philip the Chancellor, Sermon preached at the Synod of Laon on 20 May 1231 9. Philip the Chancellor, Sermon preached to laypeople at Bruyères-et-Montbérault on 21 May 1231 Bibliography Indices Nicole Bériou was Professor of Medieval History at Lyon and Paris (EPHE) until 2014. During the years 2011-2014, she was also the Director of the Institut de recherche et d'histoire des textes (CNRS) in Paris. Her thesis on preaching in thirteenth century Paris was awarded the Premier prix Gobert in 2000. As a specialist in the history of religion, culture, and communication, her main contributions deal with preaching. Since 2004 she has also been a series editor of the Bibliothèque d'histoire culturelle du Moyen Âge in collaboration with Franco Morenzoni, and since 2009, the general editor of the Revue Mabillon. Christoph T. Maier has taught medieval history at universities in Britain and Switzerland. He is presently Privatdozent at the History Department of the University of Zurich, Switzerland. He has published two monographs as well as numerous articles on crusade sermons and preaching, crusade liturgy, gender aspects of the crusades and crusade historiography, military orders, saints' cults, and late medieval urban history ranging from the ninth to the sixteenth centuries. He is the series editor of Crusades Subsidia.