Idea of crusade in Humbert of Romans' preaching

The work is focused on the analysis of a fragment of the treatise of Humbert of Romans, the fifth grand master of the Dominican Order, «About the preaching of the saint cross against the Saracens» (De praedicatione sanctae crucis contra Saracenos). The treatise was written for the purpose of training of the preachers of crusade in the 1260s. The source represents a fundamental work written by an author belonging to the contemporaries of the crusades and makes it possible to understand better their view of the events.