Constantine's father, Constantius I, was one of  these rulers. In 305, Constantius was proclaimed emperor of the western half of the empire, while  Diocletian took the eastern half for himself.

君士坦丁的父亲君士坦提乌斯一世就是其中一位统治者。 305 年，君士坦提乌斯被宣布为帝国西半部的皇帝， 而戴克里先则将东半部据为己有。