France in the year one thousand is a particularly violent society. Gentlemen brutally impose their law upon a society still barbaric, while ecclesiastics attempt to discipline the knights with the threat of divine vengeance. But what if this description were only a modern myth accepted by true? This research tries to analyze the codes and limits of medieval violence and the true role of the sacred. In contemporaneous texts such as Roland's Chanson we are shown an idealized image of knights as defenders of honor equally disposed to peace and war. On the other hand, in the monastic texts and in the stories of miracles the knights are presented to us as despots who do not recognize the supremacy of the servants of God above the earthly power. In these texts the knights end up being victims of divine punishment. The author proposes a deconstructive reading of these documents and observe what is said in passing.