Fall of the Western Roman Empire
The Constantinian dynasty's emperors retained some aspects of collegiate rule; Constantine appointed his son Constantius II as another "caesar" in 324, followed by Constans in 333 and his nephew Dalmatius in 335, and the three surviving sons of Constantine in 337 were declared joint "augusti" together, and the concept of the division of the empire under multiple joint emperors endured until the Fall of the Western Roman Empire. In the Eastern Roman empire, "augusti" and "caesares" continued to be appointed sporadically.