Procopius

Procopius came from Caesarea Maritima around 500 and spent his career shadowing the Byzantine general Belisarius through Emperor Justinian's wars. That access made him the age's foremost chronicler: he wrote the History of the Wars, a sober campaign record, and On Buildings, a catalog of Justinian's construction projects. But he also wrote the Secret History, a savage exposé of the same court he officially glorified, revealing what he actually thought of the emperor and those around him. He died around 565, leaving later centuries to puzzle over which version he meant.