Sentence Examples with the word dyarchy

But by the 2nd century the dyarchy is passing into a monarchy: the title of princeps recedes, and the title of imperator comes into prominence to designate not merely the possessor of a certain imperium, or the general of troops, but the simple monarch in the fulness of his power as head of the state.

The designation suited the early years of the Empire, in which a dyarchy of princeps and senate had been maintained.