Procopius of Caesarea (Greek: Προκόπιος ο Καισαρεύς, c. 500 – c. 565) was a prominent Eastern Roman scholar. He took part in the wars of the Emperor Justinian I, and was the major historian of the 6th century AD, writing the Wars of Justinian, the Buildings of Justinian and the celebrated Secret History. He is commonly held to be the last major historian of the ancient world.