Ottobono Fieschi, who had been a cardinal for twenty-five years, and who had recently helped bring an end to the civil strife in Genoa, was elected pope on July 11, 1276. He took the name Adrian V, and ruled the Church for 39 days. According to Bernardo di Guidone, nondum promotus in sacerdotem nec coronatus nec consecratus Viterbi moritur (He was never ordained priest, consecrated bishop or crowned pope.) (Muratori, Rerum Italicarum Scriptores III, 605; Novaes, 261).
In August he travelled to Viterbo, partly for the climate and partly to attend to some differences between the Church and Emperor Rudolph of Habsburg. The ten days he and the other cardinals spent in the conclave under the rules of Gregory X must have had their effect; at the request of the cardinals in consistory, he suspended the operation of Gregory X's constitution on conclaves, Ubi Periculum, intending to make some alterations and improvements. Death supervened on August 18, 1276, while he was at Viterbo. He had created no cardinals. He was buried in the Church of S. Francesco—not in the Cathedral or in the Convent of the Friars Minor (Cristofori, 180).
On August 27, the College of Cardinals wrote to the Emperor Rudolph (Cristofori, 175. Reg. Vat. 29 B, Epistola CXXI):
Miseratione divina etc..... (Cardinales)... Excellenti et magnifice Principi Domino Rudolfo Regi Romanorum illustri carissimo ipsius ecclesiae filio salutem in Domino. Quamquam de vacatione . . . . Insuper pie recordationes Adrianus PP V, eidem Pontifici Innocentio in apostolatus succedens officio, voluit ut idem Rex (Carolus Siciliae) se conferret Viterbum pro memoratis tractatibus prosequentis ubi Ven(erabiles) fratres Sabinensem Episcopum Ioannem S(an)c(t)i Nicolai in Carcere Tulliano et Iacobum S(an)c(ta)e Mari(a)e in Cosmydin Diac(onym) Card(inalem) super prosecutionem huiusmodi deputavit, sed quia predictus pontifex Adrianus post promotionem suam brevissimo tempore supervixit assumpta prosecutio ad id quod prosequentium intendebat instantia non pervenit . . . Datum Viterbii VI Kal. Aug. An(no) D(omi)ni MCCLXXVI apostolica Sede vacante.
Shortly after his accession Pope Adrian V had wanted King Charles I of Sicily to come to Viterbo to carry out the usual business (fealty), and sent the Suburbicarian Bishop of Sabina [Bertrand de Saint Martin]; Cardinal Giovanni (Orsini), Cardinal Deacon of Saint Nicholas in Carcere Tulliano; and Cardinal Giacomo (Savelli), Cardinal Deacon of Santa Maria in Cosmedin, to effect his wishes. Charles arrived from Rome on July 24. Unfortunately, as the letter of the cardinals indicates, Adrian died, on August 15, leaving his negotiations with King Charles unfinished. Charles finally swore fealty to Pope John XXI on October 7.
In the oath of King Charles, it is mentioned that some previous arrangements had been reached between the Papacy and the King, in instrumento seu litteris bo(nae) mem(oriae) A(nnibaldi) Basilic(a)e XII Ap(osto)lorum, P(res)b(yte)ri R(icardi) S(an)c(t)i Angeli, et venerabilium patrum Ioannis Sci Nicolai in Carcere Tulliano et Iacobi Sce Mariae in Cosmedin Diaconorum Cardinalium. The remark that Cardinal Annibaldo Annibaldi was dead seems to imply that Cardinal Riccardo Annibaldi was still alive; Cardinal Giovanni Orsini and Cardinal Jacopo Savelli certainly were alive. But in a letter of October 18, 1276, the new Pope, John XXI, writes, Qui nuper in eadem Basilica per obitum bon(a)e memori(a)e Richardi S. Angeli c. d. archipresbyteri Basilicae supradictae vacavit... (Bullarium Vaticanum I, 154; P. 21171). His death, therefore, took place between October 7 and October 18, 1276. His epitaph (quoted by Ciacconius), however, seems to give the date of death as September 4, 1276.
.At the time of Pope Adrian's death, there were, therefore, twelve or thirteen cardinals, though
There were, therefore, twelve electors present at the Conclave in Viterbo::
According to a story retailed by Franciscan historians, Cardinal Vicedomino de' Vicedomini, a Franciscan Tertiary and Protector of the Franciscans, was elected pope and died within twenty-four hours, on September 6, 1276—without doubt this is a pious fiction (Cristofori, Tombe, 185-203). His name does not appear in any official list of popes sanctioned by the Holy See. Indeed Pope John XXI's own election announcement narrates his version of the conclave, and provides no place for Vicedomino, calling Adrian V his predecessor (see below).
Tomb of Cardinal Vicedomini (Viterbo)
from Cristofori
A successful election finally took place on the 8th (or 13th or 15th) of September (see Cristofori, 341).
John XXI (XX) was crowned on September 20 by Cardinal Giovanni Gaetano Orsini, the Cardinal Protodeacon. Ten days later, in his Bull Licet, John cancelled the constitution of Gregory X, Ubi Periculum, regulating conclaves. Ptolemy of Lucca (Demski, 33 n, 3) states that this was done on the advice of Cardinal Orsini:
Hic {Ioannes XXI] statim constitutionem (datam) per Gregorium X de reclusione cardinalium, suspensam per Hadrianum, revocavit, consilio ut fertur, Domini Johannis Gaitani, cuius nutu multa iaciebat, eo quod principalis auctor fuerat suae promotionis.
On Ocotber 7, the new pope issued an encyclical letter, announcing his election and describing the recent conclave (Bullarium Romanum Turin Edition Volume IV, p. 18; Cristofori, 196-197):
Ioannes Episcopus Servus Servorum Dei.
Felicis recordationis Hadriano Papa praedecessore nostro, post promotionem suam ad Summi Apostolatus apicem, brevi dierum vitae suae tempore consummante, post exhibita eidem in solemnibus exequiis debita humanitatis obsequia, nos et fratres nostri in episcopali palatio convenimus, electioni substituendi pontificis, juxta necessitatis instantiam, et fervens nostrum desiderium vacaturi et licet diebus aliquibus, per importunitatem Viterbiensium Civium, tractatui electionis instantis nec dare possemus initium postquam tamen illi vacare potuimus astitit, ut credulitas devota supponit. Sapientiae Spiritus ex more a Nobis et fratribus ipsis suppliciter invocatus et prima die, de ipsorum fratrum concordi voto parique concordia processit de nobis tunc episcopo Tusculano, impraemeditatis et insciis, ad Petri cathedram electio canonica communis et concors. In iis itaque stupemus non immerito pariter et terremur....
Datum Viterbii Nonis Octobris Pontificatus nostri anno primo.
On October 7 (or 17) he received the fealty of King Charles I for the Kingdom of Sicily (Moroni, 59 says October 17; the text of the oath, quoted by Cristofori, 343-348, has the date of October 7). He died in Viterbo on May 16, 1277, and was buried in the cathedral there.

Modern art medal depicting John XXI
by Joao da Silva, 1953
Onuphrio Panvinio, Epitome Pontificum Romanorum a S. Petro usque ad Paulum IIII. Gestorum (videlicet) electionisque singulorum & Conclavium compendiaria narratio (Venice: Jacob Strada 1557). Platina, 3, 134-136. Lorenzo Cardella, Memorie storiche de' cardinali della Santa Romana Chiesa Tomo primo Parte secondo (Roma: Pagliarini 1792). Ludovico Antonio Muratori, Annali d' Italia Volume 18 (Firenze 1827). Giuseppe de Novaes, Elementi per la storia de' Sommi Pontefici terza edizione Volume III (Roma 1821). G. Moroni, Dizionario di erudizione storico-ecclesiastica Volume 31 (Venezia 1840) 59-60. Paul Durrieu, Étude sur les registres angevines du Roi Charles Ier Tome second (Paris 1888), 179-180. Richard Stapper, Papst Johannes XXI (Münster 1898) F. Gregorovius, History of Rome in the Middle Ages, Volume V.2 second edition, revised (London: George Bell, 1906) 475-477. Richard Sternfeld, Der Kardinal Johann Gaetan Orsini (Papst Nikolaus III.) 1244-1277 (Berlin: E. Ebering 1905) 267-275. N. Schopp, Papst Hadrian V (Heidelberg 1916).
On Bernard Ayglier, OSB, abbot of Montecassino, see: Luigi Tosti, OSB, Storia della Badia di Monte-cassino Tomo III (Napoli 1843) 6-32; 65-89
On the Annibaldi: Fedele Savio, SJ, "Gli Annibaldi di Roma nel secolo XIII," Studi e documenti di storia e diritto 17 (1896) 353-363. Francis Roth, OESA, "Il Cardinale Riccardo Annibaldi, Primo Prottetore dell' Ordine Agostiniano," Augustiniana 2 (1952) 26-60. M. Dikmans, "D' Innocent III à Boniface VIII. Histoire des Conti et des Annibaldi," Bulletin de l' Institut historique belge de Rome 45 (1975) 19-211.
On Vicedomino de' Vicedomini, and the myth of his one-day papacy, see: F. Cristofori, Le tombe dei pape in Viterbo (Siena 1887), 185-202. Cardella II, 2-3. Novaes, 262. Moroni Dizionario di erudizione storico ecclesiastica 32, 279-280. Cardella states that the story derives from a necrology kept in Piacenza and some 'ancient manuscripts' of the city, referred to by the chronicler of the Friars Minor, Vadingo in the seventeenth century.
Suspension of Gregory X's constitution on papal elections: Adrian V (Ottobono Fieschi) suspended the arrangements of Pope Gregory orally in a consistory: Giordano, quoted in Reynaldi, Annales Ecclesiasticae sub anno 1276. They were officially cancelled by the Bull Licet of Pope John XXI on September 30, 1276. A. Ceccaroni Il conclave (Roma 1901) 57.
On Simon de Brie and the Council of Bourges in September, 1276, see Carl Joseph von Hefele, Conciliengeschichte nach dem Quellen bearbeitet second edition Volume VI (Freiburg im Breisgau: Herder 1890) 176-177.
©John Paul Adams, CSUN
john.p.adams@csun.edu