Death alone terminated his power.

The choice of the new king lay with the council of elders, to which in case of a vacancy the interim-kingship (-interregnum-) passed.

A formal cooperation in the election of king pertained to the burgesses only after his nomination; -de jure- the kingly office was based on the permanent college of the Fathers (-patres-), which by means of the interim holder of the power installed the new king for life.

Thus "the august blessing of the gods, under which renowned Rome was founded," was transmitted from its first regal recipient in constant succession to those that followed him, and the unity of the state was preserved unchanged notwithstanding the personal change of the holders of power.
This unity of the Roman people, represented in the field of religion by the Roman Diovis, was in the field of law represented by the prince, and therefore his costume was the same as that of the supreme god; the chariot even in the city, where every one else went on foot, the ivory sceptre with the eagle, the vermilion-painted face, the chaplet of oaken leaves in gold, belonged alike to the Roman god and to the Roman king.

It would be a great error, however, to regard the Roman constitution on that account as a theocracy: among the Italians the ideas of god and king never faded away into each other, as they did in Egypt and the East.