This was, in fact, done at most of the elections during the ninth century, and in 898 the riots which ensued upon the death of Pope Stephen V led John IX to give ecclesiastical sanction to this system of imperial control. In a council held at Rome in that year he decreed that the election should be made by bishops (cardinal) and clergy, regard being had to the wishes of the people, but that no consecration should take place except in the presence of the imperial legate (Mansi XVIII, 225).
The due formalities at least of election appear to have been observed through the wild disorders which followed the collapse of the Carlovingian Empire: and the same is true as regards the times of Otto the Great and his son. Under the restored empire, however, the electors enjoyed no freedom of choice. Otto I even compelled the Romans to swear that they would never elect or ordain a pope without his or his son's consent (963; cf. Liutprand, "Hist. Ott.", viii). In 1046 the scandals of the preceding elections, in which the supreme pontificate had become a prize for rival factions entirely regardless of what means they employed, led clergy and people to leave the nomination to Henry III.
Three popes were chosen in this manner. But Leo IX insisted that the Church was free in the choice of her pastors, and, until he was duly elected at Rome, declined to assume any of the state of his office. The party of reform, of which Hildebrand was the moving spirit, were eager for some measure which should restore an independent choice to the Church. This was carried out by Nicholas II. In 1059 he held a council in the Lateran and issued the Decree "In Nomine". This document is found in two recensions, a papal and an imperial, both of early date. There is however little doubt that the papal recension embodied in the "Decretum Gratiani" (c. 1. d. XXIII) is genuine, and that the other was altered in the interest of the antipope Guibert.
The right of election is confined to the cardinals, the effective choice being placed in the hands of the cardinal bishops: clergy and people have a right of acclamation only. The right of confirmation is granted to the Emperor Henry IV and to such of his successors as should personally request and receive the privilege. The pope need not necessarily be taken from the number of cardinals, though this should be the case if possible.
This decree formed the basis of the present legislation on the papal election, though the system underwent considerable development. The first important modification was the Constitution "Licet de Vitanda" [c. vi, X, "De elect." (I, 6)] of Alexander III, the first of the decrees passed by the Third Oecumenical Council of the Lateran (1179). To prevent the evils of a disputed election it was established by this law that no one should be held to be elected until two thirds of the cardinals should have given their votes for him. In this decree no distinction is made between the rights of the cardinal bishops and those of the rest of the Sacred College.
The imperial privilege of confirming the election had already become obsolete owing to the breach between the Church and the Empire under Henry IV and Frederick I. Between the death of Clement IV (1268) and the coronation of Gregory X (1272) an interregnum of nearly three years intervened. To prevent a repetition of so great a misfortune the pope in the Council of Lyons (1179) issued the Decree "Ubi periculum" [c. iii, "De elect.", in 60 (I, 6)], by which it was ordained that during the election of a pontiff the cardinals should be secluded from the world under exceedingly stringent regulations, and that the seclusion should continue till they had fulfilled their duty of providing the Church with a supreme pastor.
To this electoral session was given the name of the Conclave. This system prevails at the present day.
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