The purpose of this essay is to investigate how the official propaganda concerning the Christian holy war was constructed, legitimized and motivated according to papal bulls and one letter during 1074-1213.  One conclusion is that the official propaganda was very content rich and multifaceted. This is most obvious in the bull of pope Innocent III and least so in the letter of pope Gregory VII. The propaganda used all the analysis points I constructed through the theoretical framework and previous research except the horizontal propaganda in order to legitimize and motivate the upcoming crusades. Another important conclusion is that previous research has paid to little attention to the political or the secular aspects of the propaganda. I show that both this and the religious elements were wowen into each other in order to construct a comprehensive synthesis or a crusader ideology. And I also show that this propaganda used more biblical references from the New testament than from the Old testament, in contrast to previous research.