This book brings a better understanding of the history, changes and transmission of the original astronomical Phaenomena poem. Historians, art historians, astronomy lovers, and historians of astronomy will learn more specialized details concerning the Aratea and how the tradition survived from the Middle Ages. It is a credit to the poetry of Aratus and the later interpreters of the text that its pagan aspects were not edited nor removed, but respected and maintained in the exact same form despite the fact that all sixty Aratea manuscripts mentioned in this study were produced under the rule of Christianity.