The government was an elective monarchy. Four of the principal nobles, who had been chosen by their own body in the preceding reign, filled the office of electors, to whom were added, with merely an honorary rank, however, the two royal allies of Tezcuco and Tlacopan. The sovereign was selected from the brothers of the deceased prince, or, in default of them, from his nephews. Thus the election was always restricted to the same family. The candidate preferred must have distinguished himself in war, though, as in the case of the last Montezuma, he were a member of the priesthood.[43] This singular mode of supplying the throne had some advantages. The candidates received an education which fitted them for the royal dignity, while the age at which they were chosen not only secured the nation against the evils of minority, but afforded ample means for estimating their qualifications for the office. The result, at all events, was favorable; since the throne, as already noticed, was filled by a succession of able princes, well qualified to rule over a warlike and ambitious people. The scheme of election, however defective, argues a more refined and calculating policy than was to have been expected from a barbarous nation.[44] The new monarch[45] was installed in his regal dignity with much parade of religious ceremony, but not until, by a victorious campaign, he had obtained a sufficient number of captives to grace his triumphal entry into the capital and to furnish victims for the dark and bloody rites which stained the Aztec superstition. Amidst this pomp of human sacrifice he was crowned. The crown, resembling a mitre in its form, and curiously ornamented with gold, gems, and feathers, was placed on his head by the lord of Tezcuco, the most powerful of his royal allies. The title of _King_, by which the earlier Aztec princes are distinguished by Spanish writers, is supplanted by that of _Emperor_ in the later reigns, intimating, perhaps, his superiority over the confederated monarchies of Tlacopan and Tezcuco.[46] The Aztec princes, especially towards the close of the dynasty, lived in a barbaric pomp, truly Oriental. Their spacious palaces[47] were provided with halls for the different councils who aided the monarch in the transaction of business. The chief of these was a sort of privy council, composed in part, probably, of the four electors chosen by the nobles after the accession, whose places, when made vacant by death, were immediately supplied as before. It was the business of this body, so far as can be gathered from the very loose accounts given of it, to advise the king, in respect to the government of the provinces, the administration of the revenues, and, indeed, on all great matters of public interest.[48]