Herodiani Historiarum Libri 8 is a historical book written by Herodianus, a Roman historian who lived in the 3rd century AD. The book is divided into eight volumes and covers the period from the death of Marcus Aurelius in 180 AD to the accession of Gordian III in 238 AD. The book provides a detailed account of the political and military events that took place during this period, including the reigns of the emperors Commodus, Pertinax, Septimius Severus,...