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Election of the kings

Whenever a king died, Rome entered a period of interregnum. Supreme power of the state would devolve to the Senate, which was responsible for finding a new king. The Senate would assemble and appoint one of its own members—the interrex —to serve for a period of five days with the sole purpose of nominating the next king of Rome. If no king were nominated at the end of five days, with the Senate's consent the interrex would appoint another Senator to succeed him for another five-day term. This process would continue until a new king was elected. Once the interrex found a suitable nominee to the kingship, he would bring the nominee before the Senate and the Senate would review him. If the Senate passed the nominee, the interrex would convene the Curiate Assembly and preside over it during the election of the king. Once the nominee was proposed to the Curiate Assembly, the citizens of Rome could either accept or reject him. If accepted, the king-elect did not immediately enter office. Two other acts still had to take place before he was invested with the full regal authority and power.

First, it was necessary to obtain the divine will of the gods respecting his appointment by means of the auspices, since the king would serve as high priest of Rome. This ceremony was performed by an augur, who conducted the king-elect to the citadel, where he was placed on a stone seat as the people waited below. If found worthy of the kingship, the augur announced that the gods had given favourable tokens, thus confirming the king's priestly character. The second act which had to be performed was the conferral of the imperium upon the king. The Curiate Assembly's previous vote only determined who was to be king, and had not by that act bestowed the necessary power of the king upon him. Accordingly, the king himself proposed to the Curiate Assembly a law granting him imperium, and the Curiate Assembly by voting in favor of the law would grant it. In theory, the people of Rome elected their leader, but the Senate had most of the control over the process.