In the past historians have used the works of Honorius Augustodunensis to answer the question of who he was. In doing this the intellectual importance of his work has often been overlooked. Honorius was one of the most popular writers of the early twelfth century, and his most popular work was the Imago Mundi. The purpose of this study is to examine the work and its historical context and to furnish an English translation of the complete text. The present work looks at each book of the Imago Mundi and its sources to develop a concept of Honorius' writing style and his methods. It also examines twelfth-century manuscripts of the Imago Mundi and their houses of origin to construct a reason for the work's popularity, both in Honorius' own time and for centuries after.