A work by a fourth-century Roman historian, Ammianus Marcellinus, whose work chronicled in Latin the history of Rome from 96 to 378. He is often called the last great historian of Rome, and his writings – one of the outstanding achievements of Latin language and literature. The FAmmianus’ work appears an eyewitness account, full of bright descriptions and ingenious emotion. The skill of the narrator, accuracy and truthfulness brought the author the fame of a respectable representative of Roman historical tradition, side by side with Titus Livius, Publius Cornelius Tacitus, and Gaius Suetonius Tranquillus. The author offers numerous details on Roman executive system and the events of social life of the time, tells of the state of affairs in the Empire, falling into decay, of the main Roman Enemies and personal qualities of the emperors. Their portraits are notable for vividness and depth. The authenticity of the information given by Ammianus has never been disputed, for he is considered to treat the sources critically and carefully. His work still remains a rich source of information concerning the political history.