The article analyzes a short passage from the Guibert of Nogent’s Dei Gesta per Francos (God’s Deeds through the Franks) which is placed before the account of the life of Muhammad, the prophet of Islam. In this passage the French theologian drew a very broad picture of the Orient seen as a vast region where the teaching of Muhammad had emerged and where the Crusaders had to fight against the infidels. The author of the article tries to interpret the sense and the contents of this text. She raises the question of how this passage about the Orient is related to the biography of Muhammad, what is the task it performs in the narrative and how the Orient is portrayed by one of the most well-known First Crusade chroniclers.