This book was prepared by the University of Oxford and is a deep, serious and at the same time fascinating study of the centuries-old history of the crusading movement, which had a profound impact on the development of Europe. The authors - British scientists - examine this topic from various aspects and provide rich factual material. The publication, equipped with unique illustrative material, is today one of the most comprehensive in terms of the amount of information on this topic. This is the first time in our country that such a complete history of one of the most significant phenomena of the Middle Ages has been published.