Procopius, holding a position in a period of transition between classical Greek and Byzantine literature, is the first and most talented of Byzantine historians. His writings are characterized by an energetic combination of the Attic models of the affected, but often picturesque style employed by the Byzantine writers. Although he is not free from errors of taste, he expresses his ideas with great vigour, and his thoughts are often worthy of a better age. The information which he has given us is exceedingly valuable. He had ample opportunities of observation, and his works present us with the best picture of the reign of Justinian, so important in Greco-Roman annals.