This book is the first critical edition of the Latin poem Historia Vie Hierosolimitane, by Gilo of Paris and a second anonymous author, translated for the first time into English and accompanied by a detailed historical and linguistic commentary. Significant for its links with the vernacular Chanson d'Antioch, the poem illustrates how quickly a theological and cultural understanding of the first crusade developed after the events themselves and shows how soon the leaders of the crusades came to be regarded as heroes'.