This essay, written by George Nathaniel Curzon, is a comprehensive examination of the reign of Justinian I, one of the most important Byzantine emperors. Curzon provides detailed analysis of Justinian's policies, military campaigns, and religious reforms, as well as his overall influence on the Byzantine Empire. This work is essential for anyone interested in the history of the Byzantine Empire or the development of medieval Europe. This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it. This work is in the "public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.