Ammianus Marcellinus (325/330-after 391) was a fourth-century Roman historian. He wrote the penultimate major historical account surviving from Antiquity. His work chronicled in Latin the history of Rome from 96 to 378, although only the sections covering the period 353-378 are present in this book. His entire work, including the missing first thirteen books, is a history of the Roman empire from the accession of Nerva (96) to the death of Valens at the Battle of Adrianople (378), in effect writing a continuation of the history of Tacitus.