thumb|The [[1492 papal conclave was the first to be held in the Sistine Chapel.]]
A conclave is a gathering of the College of Cardinals convened to appoint the pope of the Catholic Church. Catholics consider the pope to be the apostolic successor of Saint Peter and the earthly head of the Catholic Church.
Concerns around political interference led to reforms after the interregnum of 1268–1271 and Pope Gregory X's decree during the Second Council of Lyons in 1274 that the cardinal electors should be locked in seclusion and not permitted to leave until a new pope had been elected. Conclaves are now held in the Sistine Chapel of the Apostolic Palace in Vatican City.
From the Apostolic Age until 1059, the pope, like other bishops, was chosen by the consensus of the clergy (priests and deacons) and laity of the diocese. In 1059, the body of electors was more precisely defined, when the College of Cardinals was designated the sole body of electors. Since then, other details of the procedures have developed. In 1970, Pope Paul VI limited the electors to cardinals under 80 years of age in Ingravescentem aetatem. The procedures established by Pope John Paul II in Universi Dominici gregis
A two-thirds supermajority vote is required to elect the new pope.
Historical development
The procedures for the election of the pope developed over almost two millennia. Until the College of Cardinals was created in 1059, the bishops of Rome, like those in other areas, were elected by acclamation of the local clergy and people. Procedures similar to the present system were introduced in 1274 when Gregory X promulgated Ubi periculum following the action of the magistrates of Viterbo during the interregnum of 1268–1271.
The process was further refined by Gregory XV with his 1621 papal bull Aeterni Patris Filius, which established the requirement of a two-thirds majority of cardinal electors to elect a pope. The Third Council of the Lateran had initially set the requirement that two-thirds of the cardinals were needed to elect a pope in 1179. This requirement had varied since then, depending on whether the winning candidate was allowed to vote for himself, in which cases the required majority was two-thirds plus one vote. Aeterni Patris Filius prohibited this practice and established two-thirds as the standard needed for election.
Aeterni Patris Filius did not eliminate the possibility of election by acclamation, but did require that a secret ballot take place first before a pope could be elected. Prior to 1621, a cardinal could vote for himself, but it was always with the knowledge and consent of enough of the other voting cardinals, so that he did not make the final decision to make himself pope (accessus). Ballots were either signed or initialed in the corner of the ballot, or sometimes coded and numbered.
Electorate
As early Christian communities emerged, they elected bishops, chosen by the clergy and laity with the assistance of the bishops of neighbouring dioceses. As in other dioceses, the clergy of the Diocese of Rome was the electoral body for the bishop of Rome. Instead of casting votes, the bishop was selected by general consensus or by acclamation. The candidate was then submitted to the people for their general approval or disapproval. This lack of precision in the election procedures occasionally gave rise to rival popes or antipopes.
The right of the laity to reject the person elected was abolished by a synod held in the Lateran in 769, but restored to Roman noblemen by Pope Nicholas I during a synod of Rome in 862. A major change came in 1059, when Pope Nicholas II decreed in that the cardinals were to elect a candidate to take office after receiving the assent of the clergy and laity. The cardinal bishops were to meet first and discuss the candidates before summoning the cardinal priests and cardinal deacons for the actual vote.
Through much of the Middle Ages and Renaissance the Catholic Church had only a small number of cardinals at any one time, as few as seven under either Pope Alexander IV (1254–1261) or Pope John XXI (1276–1277). The difficulty of travel further reduced the number arriving at conclaves. The small electorate magnified the significance of each vote and made it all but impossible to displace familial or political allegiances. Conclaves lasted months and even years. In his 1274 decree requiring the electors be locked in seclusion, Gregory X also limited each cardinal elector to two servants and rationed their food progressively when a conclave reached its fourth and ninth days. Lengthy elections resumed and continued to be the norm until 1294, when Pope Celestine V reinstated the 1274 rules. Long interregna followed: in 1314–1316 during the Avignon Papacy, where the original conclaves were dispersed by besieging mercenaries and not reconvened for almost two years; and in 1415–1417, as a result of the Western Schism.
Until 1899, it was a regular practice to generally include a few lay members in the Sacred College. These were often prominent nobility, or monks who were not priests, and in all cases, celibacy was required. With the death of Teodolfo Mertel in 1899, this practice was ended. In 1917, the Code of Canon Law promulgated that year, explicitly stated that all cardinals must be priests. Since 1962, all cardinals have been bishops, with the exception of a few priests who have been made cardinals since about 1970. These few have all been at least 80 years old and not allowed to vote in a papal election, since Paul VI in that same year of 1970 imposed the rule that all voting cardinals be under 80 years of age. If a priest is asked by the pope to become a cardinal he may request not to be ordained a bishop, but this is the exception rather than the rule.
In 1587, Pope Sixtus V limited the number of cardinals to 70, following the precedent of Moses who was assisted by 70 elders in governing the Children of Israel: 6 cardinal bishops, 50 cardinal priests, and 14 cardinal deacons.
In 1975, he limited the number of cardinal electors to 120. Though this remains the theoretical limit, all of his successors have exceeded it for short periods of time. John Paul II (in office 1978–2005) made a slight change to the age limit rules, barring cardinals 80 or older from serving as electors if they reach that age before the papacy becomes vacant. who became bishop of Milan in 374. In the wake of the violent dispute over the 767 election of Antipope Constantine II, Pope Stephen III held the synod of 769, which decreed that only a cardinal priest or cardinal deacon could be elected, specifically excluding those that are already bishops. Church practice deviated from this rule as early as 817 and fully ignored it from 882 with the election of Pope Marinus I, the bishop of Caere.
Nicholas II, in the synod of 1059, formally codified existing practice by decreeing that preference was to be given to the clergy of Rome, but leaving the cardinal bishops free to select a cleric from elsewhere if they so decided. The Lateran Council of 1179 rescinded these restrictions on eligibility. The last person elected as pope who was not already an ordained priest or deacon was the cardinal-deacon Giovanni di Lorenzo de' Medici, elected as Pope Leo X in 1513. His successor, Pope Adrian VI, was the last to be elected, in 1522, in absentia. Archbishop Giovanni Montini of Milan received several votes in the 1958 conclave though not yet a cardinal. As the Catholic Church holds that women cannot be validly ordained, women are not eligible for the papacy. Though the pope is the bishop of Rome, he need not be of Italian background. , the four most recent conclaves have elected a Pole in 1978, a German in 2005, an Argentinian in 2013, and an American in 2025.
During the first millennium, popes were elected unanimously, at least in theory. After a decree by the Synod of Rome in 1059, some factions contended that a simple majority sufficed to elect. In 1179, the Third Council of the Lateran settled the question by calling for unanimity, but permitting the Pope to be elected by two-thirds majority, "if by chance, through some enemy sowing tares, there cannot be full agreement." As cardinals were not allowed to vote for themselves after 1621, the ballots were designed to ensure secrecy while at the same time preventing self-voting.
In 1945, Pope Pius XII removed the requirement for signed ballots as well as the prohibition on a cardinal voting for himself, increasing the requisite majority to two-thirds plus one at all times. His successor John XXIII immediately reinstated the two-thirds majority if the number of cardinal electors voting is divisible by three, with an additional vote required if the number is not divisible by three. Paul VI reinstated Pius XII's procedure thirteen years later, but Pope Gregory XV excluded this method in 1621.
- To elect by compromise, a deadlocked college unanimously delegates the election to a committee of cardinals, whose choice they all agree to abide by. Universi Dominici gregis formally abolished the long-unused methods of acclamation and compromise in 1996, making scrutiny the only approved method for the election of a new pope.
After the demise of the Western Roman Empire, influence passed to the Ostrogothic kings of Italy. In 533, Pope John II formally recognised the right of the Ostrogothic monarchs to ratify elections. By 537, the Ostrogothic monarchy had been overthrown, and power passed to the Byzantine emperors. A procedure was adopted whereby officials were required to notify the exarch of Ravenna upon the death of a pope before proceeding with the election. Once the electors arrived at a choice, they were required to send a delegation to Constantinople requesting the emperor's consent, which was necessary before the individual elected could take office.
Travel to and from Constantinople caused lengthy delays. The last pope to notify a Byzantine emperor was Zachary in 741.
In the 9th century, the Carolingian Empire (and its successor, the Holy Roman Empire) came to exert control over papal elections. Charlemagne, emperor from 800 to 814, and Louis the Pious, emperor from 813 to 840 did not interfere with the Church. Lothair I, emperor from 817 to 855, claimed that an election could only take place in the presence of imperial ambassadors. In 898, riots forced Pope John IX to recognise the superintendence of the Holy Roman emperor. At the same time, the Roman nobility continued to exert great influence, especially during the tenth-century period known as saeculum obscurum, Latin for "the dark age".
In 1059, the same papal bull that restricted suffrage to the cardinals recognised the authority of the Holy Roman emperor, at the time Henry IV, but only as a concession made by the pope, declaring that the emperor had no authority to intervene in elections, except where permitted to do so by papal agreements. In 1122, the Holy Roman Empire acceded to the Concordat of Worms, accepting the papal decision.
From about 1600, certain Catholic monarchs claimed a jus exclusivae (right of exclusion), i.e. a veto over papal elections, exercised through a crown-cardinal. By an informal convention, each state claiming the veto could exercise the right, once per conclave. Therefore, a crown-cardinal did not announce his veto until the very last moment, when the candidate in question seemed likely to get elected. No vetoes could be employed after an election. After the Holy Roman Empire dissolved in 1806, its veto power devolved upon the Austrian Empire. The last exercise of the veto occurred in 1903, when Prince Jan Puzyna de Kosielsko informed the College of Cardinals that Austria opposed the election of Mariano Rampolla. Consequently, the college elected Giuseppe Sarto as Pope Pius X, who issued the constitution Commissum nobis six months later, declaring that any cardinal who communicated his government's veto in the future would suffer excommunication latae sententiae.
Seclusion and resolution
To resolve prolonged deadlocks in papal elections in the earlier years, local authorities often resorted to the forced seclusion of the cardinal electors, such as first in the city of Rome in 1241, and possibly before that in Perugia in 1216. In 1268, when the forced seclusion of the cardinals failed to produce a pope, the city of Viterbo refused to send in any materials except bread and water. When even this failed to produce a result, the townspeople removed the roof of the Palazzo dei Papi in their attempt to speed up the election. It lasted for two years and eight months and was the longest conclave in history.
In 1274, in an attempt to avoid future lengthy elections, Gregory X introduced stringent rules, with the promulgation of Ubi periculum. Cardinals were to be secluded in a closed area and not accorded individual rooms. No cardinal was allowed, unless ill, to be attended by more than two servants. Food was supplied through a window to avoid outside contact.