| Month: | August |
| Year: | 1464 |
| Dates: | 28–30 August 1464 |
| Location: | Apostolic Palace, Papal States |
| Dean: | Bessarion |
| Camerlengo: | Ludovico Trevisan |
| Protopriest: | Petrus von Schaumberg |
| Protodeacon: | Rodrigo Borgia |
| Ballots: | 1 |
| Pope Elected: | Pietro Barbo |
| Nametaken: | Paul II |
| Prevconclave Year: | 1458 |
| Prevconclave Link: | 1458 papal conclave |
| Nextconclave Year: | 1471 |
| Nextconclave Link: | 1471 papal conclave |
The 1464 papal conclave (August 28–30), convened after the death of Pope Pius II, elected as his successor cardinal Pietro Barbo, who took the name Paul II.
Pope Pius II died on August 14, 1464, in Ancona during preparations for the crusade against the Ottoman Empire. At the time of his death, there were 29 living cardinals, but only 19 of them participated in the conclave:[1]
| Elector | Nationality | Cardinalatial Title | Elevated | Elevator | Notes[2] | |
|---|---|---|---|---|---|---|
| Bessarion | Greek | Bishop of Frascati
| 1439, December 18 | Pope Eugenius IV | Dean of the Sacred College of Cardinals
| |
| Guillaume d'Estouteville, O.S.B.Cluny | French | Bishop of Ostia e Velletri | 1439, December 18 | Pope Eugenius IV | Archbishop of Rouen and administrator of Saint-Jean-de-Maurienne; Archpriest of the patriarchal Liberian Basilica; Cardinal-protector of the Order of Augustinians | |
| Juan de Torquemada, O.P. | Castilian | Bishop of Sabina | 1439, December 18 | Pope Eugenius IV | Bishop of Ourense | |
| Juan Carvajal | Castilian | Bishop of Porto e Santa Rufina
| 1446, December 16 | Pope Eugenius IV | Bishop of Plasencia
| |
| Ludovico Trevisan | Venetian | Priest of S. Lorenzo in Damaso | 1440, July 1 | Pope Eugenius IV | Camerlengo of the Holy Roman Church | |
| Pietro Barbo (elected Pope Paul II) | Venetian | Priest of S. Marco | 1440, July 1 | Pope Eugenius IV (Cardinal-nephew) | Bishop of Vicenza
| |
| Latino Orsini | Roman | Priest of SS. Giovanni e Paolo | 1448, December 20 | Pope Nicholas V | Administrator of Bari; Archpriest of the patriarchal Lateran Basilica | |
| Alain de Coëtivy | French | Priest of S. Prassede | 1448, December 20 | Pope Nicholas V | Bishop of Avignon and administrator of Dol | |
| Filippo Calandrini | Bolognese | Priest of S. Lorenzo in Lucina | 1448, December 20 | Pope Nicholas V (Cardinal-nephew) | Grand penitentiary | |
| Juan de Mella | Castilian | Priest of S. Prisca | 1456, December 17 | Pope Callixtus III | Bishop of Zamora | |
| Giacomo Tebaldi | Neapolitan | Priest of S. Anastasia | 1456, December 17 | Pope Callixtus III | ||
| Richard Olivier de Longueil | French | Priest of S. Eusebio | 1456, December 17 | Pope Callixtus III | Bishop of Coutances | |
| Angelo Capranica | Roman | Priest of S. Croce in Gerusalemme | 1460, March 5 | Pope Pius II | Bishop of Rieti | |
| Bartolomeo Roverella | Ferrara | Priest of S. Clemente | 1461, December 18 | Pope Pius II | Archbishop of Ravenna
| |
| Louis d'Albret | French | Priest of SS. Marcellino e Pietro | 1461, December 18 | Pope Pius II | Bishop of Cahors | |
| Giacomo Ammanati-Piccolomini | Siena | Priest of S. Crisogono | 1461, December 18 | Pope Pius II (Cardinal-nephew) | Bishop of Pavia
| |
| Rodrigo Borgia | Catalan | Deacon of S. Nicola in Carcere Tulliano; commendatario of S. Maria in Via Lata | 1456, September 17 | Pope Callixtus III (Cardinal-nephew) | Protodeacon of the Sacred College of Cardinals; Vice-Chancellor of the Holy Roman Church; Administrator of Valencia | |
| Francesco Todeschini-Piccolomini | Siena | Deacon of S. Eustachio | 1460, March 5 | Pope Pius II (Cardinal-nephew) | Administrator of Siena; Legate in Rome and the Papal States | |
| Francesco Gonzaga | Mantua | Deacon of S. Maria Nuova | 1461, December 18 | Pope Pius II | Bishop of Brixen |
Ten electors were Italian, four Spaniards, four French and one Greek. Six were created by Pius II, six by Eugenius IV, four by Callixtus III and three by Nicholas V.
Ten cardinals (over 1/3 of the whole Sacred College) did not participate in this conclave:[1]
| Elector | Nationality | Cardinalatial Title | Elevated | Elevator | Notes | |
|---|---|---|---|---|---|---|
| Pierre de Foix, O.F.M. | French | Bishop of Albano | September, 1414 | Antipope John XXIII | Legate in Avignon; administrator of Lescar and Tarbes | |
| Petrus von Schaumberg | German | Priest of S. Vitale | 1439, December 18 | Pope Eugenius IV | Protopriest of the Sacred College of Cardinals; Bishop of Augsburg | |
| Dénes Szécsi | Hungarian | Priest of S. Ciriaco | 1439, December 18 | Pope Eugenius IV | Archbishop of Esztergom
| |
| Jean Rolin | French | Priest of S. Stefano al Monte Celio | 1448, December 20 | Pope Nicholas V | Bishop of Autun | |
| Luis Juan del Mila y Borja | Catalan | Priest of SS. IV Coronati | 1456, September 17 | Pope Callixtus III (Cardinal-nephew) | Bishop of Lerida | |
| Berardo Eroli | Narni | Priest of S. Sabina | 1460, March 5 | Pope Pius II | Bishop of Spoleto
| |
| Niccolò Fortiguerra | Pistoia | Priest of S. Cecilia | 1460, March 5 | Pope Pius II (Cardinal-nephew) | Bishop of Teano
| |
| Burchard of Weissbruch | German | Priest of SS. Nereo ed Achilleo | 1460, March 5 | Archbishop of Salzburg | ||
| Jean Jouffroy, O.S.B.Cluny | French | Priest of SS. Silvestro e Martino ai Monti | 1461, December 18 | Pope Pius II | Bishop of Albi | |
| Jaime Cardona | Catalan | Priest [no title assigned] | 1461, December 18 | Pope Pius II | Bishop of Urgel |
Of the absentee cardinals five were created by Pius II, two by Eugenius IV, one by Callixtus III and one by Nicholas V. Pierre de Foix was the last surviving cardinal of the Great Western Schism and was elevated by Pisan Antipope John XXIII.
Among them there were three French, two Italians, two Germans, two Spaniards and the one Hungarian.
Bessarion, d'Estouteville, Trevisan, Carvajal, Torquemada and Barbo were mentioned as main papabili in the contemporary reports of the ambassadors and envoys of Italian Princes. Also Calandrini, Roverella and Capranica were referred to as possible candidates.[3]
On the evening of August 28 all cardinals present in Rome entered the conclave in the Vatican, with the exception of ill Cardinal Torquemada, who joined the rest on the following day.
Initially, in order to secure to the cardinals a greater share of power than they had enjoyed under Pius II, a capitulation was prepared the conclave capitulation, and all except Ludovico Trevisan subscribed to it. The terms of the capitulation were the following:
The first scrutiny took place on August 30. Cardinal Pietro Barbo received eleven votes, while the remaining fell to Trevisan and d'Estouteville.[5] On the following accessus Barbo received three additional votes and was elected Pope.[5] He took the name Paul II,[6] and a little bit later protodeacon Rodrigo Borgia announced the election to the people of Rome with the ancient formula Habemus Papam. On September 6 the new pope was solemnly crowned on the steps of the patriarchal Vatican Basilica by Cardinal Niccolò Fortiguerra, priest of the title of S. Cecilia.[7]