Carcasonne was one of the strongholds of the Cathar heresy, and the city suffered greatly during the Albigensian Crusade. The following excerpt from a Dominican manual used by inquisitors there in 1248-1249 gives the methods that should be employed when questioning individuals suspected of heresy.

Thereafter, the person is diligently questioned about whether he saw a heretic or Waldensian, where and when, how often and with whom, about others who were present; whether he listed to their preaching or exhortation and whether-he gave them lodging or arranged shelter for them; whether he conducted them from place to place or otherwise consorted with them or arranged for them to be guided or escorted; whether he ate or drank with them or ate bread blessed by them; whether he gave or sent anything to them; whether he acted as their financial agent or...