The first detailed commentary on Procopius' Persian Wars, a rich source for many aspects of the reign of Justinian. Procopius was the major historian of the reign of Justinian and one of the most important historians of Late Antiquity. This is the first extensive commentary on his Persian Wars since the nineteenth century. The work is among the most varied of the author, incorporating the history and geography not only of Mesopotamia and the Caucasus, but also of southern Arabia and Ethiopia, Iran and Central Asia, and Constantinople itself.