The Roman empire remains unique. Although Rome claimed to rule the world, it did not. Rather, its uniqueness stems from the culture it created and the loyalty it inspired across an area that stretched from the Tyne to the Euphrates. Moreover, the empire created this culture with a bureaucracy smalle[...]

This title presents a pioneering history of this 'period of crisis' for the Roman Empire. The Roman empire during the period framed by the accession of Septimus Severus in 193 and the rise of Diocletian in 284 has conventionally been regarded as one of crisis. Between 235 and 284, at least 18 men he[...]