The papal conclave from August 6-9, 1471 elected Pope Sixtus IV following the death of Pope Paul II. With the exception of the conclaves of the Western Schism, this conclave was the first since 1305 to feature a working, two-thirds majority of Italians within the College of Cardinals, in no small part because of the absence of six non-Italian cardinals. This was in part due to the unexpectedness of the death of Paul II.
The two main factions were those of d'Estouteville and Orsini, the latter of whom secured a major pre-conclave victory in managing to persuade the rest of the College to exclude the cardinals created by Paul II in pectore, in explicit defiance of the last will and testament of the previous pontiff. Such creatures would be allowed to participate, for example, in the papal conclave, 1492. Paul II had created at least eight cardinals in secret, at least five of whom were alive at the time of the conclave: Pedro Ferriz, Pietro Foscari, Giovanni Battista Savelli, Ferry de Clugny, and Jan Vitez.
A conclave capitulation was drawn up at the beginning of the conclave, but unusually it contained no explicit limitations on papal power, except to continue the Crusading war against the Turks. The aforementioned factions can more specifically be referred to as the "Pieschi" (primarily the creations of Pius II) and the "Paoleschi" (primarily the creations of Paul II).
As in the immediately previous conclaves, Bessarion emerged as an early favorite, with six votes on the second day, those of: d'Estouteville, Calandrini, Capranica, Ammanati-Piccolomini, Caraffa, and Barbo; d'Estouteville trailed with the votes of Bessarion, Gonzaga, and Monferrato as did Forteguerri with the votes of Orsini, Eruli, and Agnifilo; Orsini got nods from della Rovere and Michiel; Roverella from Borgia and Zeno; Eruli from Forteguerri; and Calandrini from Roverella. The old arguments against Bessarion, namely that he was a non-Italian, who in addition would be unacceptable to the princes of France, again prevailed.
The voting tallies are known with specificity because of the notes of Nicodemo de Pontremoli, sent to Duke of Milan Galeazzo Maria Sforza, currently residing in the State Archives of Milan. Notable favorites in the ensuing scrutinies are (chronologically): Calandrini, Forteguerri, and Roverella.
Of the favored candidates of Sforza, della Rovere was the most electable, so Gonzaga and Borja lobbied for him behind the scenes, all the while disguising their intentions by voting for others until the morning of August 9th, when along with d'Estouteville and Barbo they changed their votes to della Rovere in the accessus, giving him a total of 13 votes. The cardinals voting for della Rovere in the scrutiny were: Monferrato, Zeno, Michiel, Agnifilo, Roverella,Forteguerri, Bessarion, Calandrini, and Orsini. Contrary to the perennial tradition, the five remaining cardinals did not change their votes to della Rovere in the accessus to make the election "unanimous".
|Guillaume d'Estouteville, O.S.B.Clun.||French||Cardinal-bishop||Bishop of Ostia e Velletri, archbishop of Rouen||Dean of the College of Cardinals|
|Basilios Bessarion||Greek||Cardinal-bishop||Bishop of Sabina|
|Latino Orsini||Roman||Cardinal-bishop||Bishop of Frascati|
|Filippo Calandrini||Cardinal-bishop||Bishop of Albano and Bologna||Cardinal-nephew|
|Angelo Capranica||Cardinal-priest||Title of S. Croce in Gerusalemme|
|Berardo Eroli||Cardinal-priest||Title of S. Sabina, bishop of Spoleto|
|Niccolò Fortiguerra||Cardinal-priest||Title of S. Cecilia, bishop of Teano|
|Bartolomeo Roverella||Cardinal-priest||Title of S. Clemente, archbishop of Ravenna|
|Jacopo Piccolomini-Ammannati||Cardinal-priest||Title of S. Crisogono, bishop of Pavia||Arrived on August 7|
|Oliviero Carafa||Neapolitan||Cardinal-priest||Title of S. Eusebio, archbishop of Naples|
|Amico Agnifilo||Cardinal-priest||Title of S. Maria in Trastevere|
|Marco Barbo||Venetian||Cardinal-priest||Title of S. Marco, patriarch of Aquileia||Cardinal-nephew|
|Francesco della Rovere, O.F.M.Conv.||Cardinal-priest||Title of S. Pietro in Vincoli||Elected Pope Sixtus IV|
|Rodrigo Borja||Spanish||Cardinal-deacon||Deacon of S. Nicola in Carcere Tulliano, administrator of Valencia||Future Pope Alexander VI; cardinal-nephew|
|Francesco Gonzaga||Cardinal-deacon||Deacon of S. Maria Nuova|
|Teodoro Paleologo di Monteferrato||Cardinal-deacon||Deacon of S. Teodoro|
|Giovanni Battista Zeno||Venetian||Cardinal-priest||Title of S. Anastasia||Cardinal-nephew|
|Giovanni Michiel||Cardinal-deacon||Deacon of S. Angelo in Pescheria||Cardinal-nephew|
|Alain de Coëtivy||French||Cardinal-bishop||Bishop of Palestrina|
|Jean Rolin||French||Cardinal-priest||Title of S. Stefano al Monte Celio, bishop of Autun|
|Luis Juan del Milà||Spanish||Cardinal-priest||Title of Ss. IV Coronati, bishop of Lérida|
|Jean Jouffroy, O.S.B.Clun.||French||Cardinal-priest||Title of Ss. Silvestro e Martino ai Monti, bishop of Albi|
|Thomas Bourchier||English||Cardinal-priest||Title of S. Ciriaco, archbishop of Canterbury|
|Jean Balue||French||Cardinal-priest||Title of S. Susanna, bishop of Angers|
|Francesco Todeschini-Piccolomini||Sienese||Cardinal-deacon||Deacon of S. Eustachio, bishop of Siena||Future Pope Pius III|
- ↑ 1.00 1.01 1.02 1.03 1.04 1.05 1.06 1.07 1.08 1.09 1.10 Burkle-Young, Francis A. 1998. "The election of Pope Sixtus IV (1471)".
- ↑ Trollope, Thomas Adolphus. 1876. The papal conclaves, as they were and as they are. p. 156.
- ↑ Creighton, Mandell. 1887. A history of the papacy during the period of the Reformation. p. 56.