Papal Election, 1241
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The 1241 papal election (21 September to 25 October) saw the election of Cardinal Goffredo Castiglioni as Pope Celestine IV. The election took place during the first of many protracted ''
sede vacante In the Catholic Church, ''sede vacante'' is the state during which a diocese or archdiocese is without a prelate installed in office, with the prelate's office being the cathedral. The term is used frequently in reference to a papal interre ...
s'' of the
Middle Ages In the history of Europe, the Middle Ages or medieval period lasted approximately from the 5th to the late 15th centuries, similarly to the post-classical period of global history. It began with the fall of the Western Roman Empire and ...
, and like many of them was characterized by disputes between popes and the
Holy Roman Emperor The Holy Roman Emperor, originally and officially the Emperor of the Romans (disambiguation), Emperor of the Romans (; ) during the Middle Ages, and also known as the Roman-German Emperor since the early modern period (; ), was the ruler and h ...
. Specifically, the election took place during the war between
Frederick II, Holy Roman Emperor Frederick II (, , , ; 26 December 1194 – 13 December 1250) was King of Sicily from 1198, King of Germany from 1212, King of Italy and Holy Roman Emperor from 1220 and King of Jerusalem from 1225. He was the son of Emperor Henry VI, Holy Roman ...
and the
Lombard League The Lombard League (; ) was an alliance of cities formed in 1167, and supported by the popes, to counter the attempts by the Hohenstaufen Holy Roman emperors to establish direct royal administrative control over the cities of the Kingdom of It ...
and deceased pontiff,
Pope Gregory IX Pope Gregory IX (; born Ugolino di Conti; 1145 – 22 August 1241) was head of the Catholic Church and the ruler of the Papal States from 19 March 1227 until his death in 1241. He is known for issuing the '' Decretales'' and instituting the Pa ...
, with Italy divided between pro-Papal and pro-Imperial factions known as the
Guelphs and Ghibellines The Guelphs and Ghibellines ( , ; ) were Political faction, factions supporting the Pope (Guelphs) and the Holy Roman Emperor (Ghibellines) in the Italian city-states of Central Italy and Northern Italy during the Middle Ages. During the 12th ...
. During the ''sede vacante'', Frederick II surrounded Rome with his armies, blocking the arrival of some cardinal electors known to be hostile to his interests. Unable to reach a consensus, the cardinals were locked in a monastery called the Septasolium (corrupted in both medieval and modern narratives into Septizodium) by the Roman civic officials, eventually settling on one of their oldest and most feeble members. The conditions within the building were believed to have contributed to the death of one of the '' papabile'' and even to the death of Celestine IV soon after the election. Following Celestine IV's death, the war on the peninsula resumed and the cardinals dispersed for over a year and a half before coming together in
Anagni Anagni () is an ancient town and ''comune'' in the province of Frosinone, Lazio, in the hills east-southeast of Rome. It is a historical and artistic centre of the Latin Valley. Geography Overview Anagni still maintains the appearance of a s ...
to elect Pope Innocent IV. The forced sequestration of the cardinals during the election was historically significant, and—along with other papal elections of the 13th century—contributed to the development of the
papal conclave 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 ...
.


Context

The papacy of
Pope Gregory IX Pope Gregory IX (; born Ugolino di Conti; 1145 – 22 August 1241) was head of the Catholic Church and the ruler of the Papal States from 19 March 1227 until his death in 1241. He is known for issuing the '' Decretales'' and instituting the Pa ...
(1227–1241) and the kingship of
Frederick II, Holy Roman Emperor Frederick II (, , , ; 26 December 1194 – 13 December 1250) was King of Sicily from 1198, King of Germany from 1212, King of Italy and Holy Roman Emperor from 1220 and King of Jerusalem from 1225. He was the son of Emperor Henry VI, Holy Roman ...
took place at a time when centuries-old disputes between the popes and emperors were coming to a head. Frederick II had dedicated troops, but not his own leadership, to the failed Fifth Crusade, to the dismay of the church; following his marriage to Isabella II of Jerusalem, he took up the
Sixth Crusade The Sixth Crusade (1228–1229), also known as the Crusade of Frederick II, was a military expedition to recapture Jerusalem and the rest of the Holy Land. It began seven years after the failure of the Fifth Crusade and involved very little actua ...
but later abandoned it and returned to Italy, for a variety of political, economic, and military reasons. This served as a pretext for his excommunication by Gregory IX, and thinly veiled skirmishes between supporters of the pope and emperor (
Guelphs and Ghibellines The Guelphs and Ghibellines ( , ; ) were Political faction, factions supporting the Pope (Guelphs) and the Holy Roman Emperor (Ghibellines) in the Italian city-states of Central Italy and Northern Italy during the Middle Ages. During the 12th ...
, respectively) throughout the Italian peninsula, particularly in
Lombardy The Lombardy Region (; ) is an administrative regions of Italy, region of Italy that covers ; it is located in northern Italy and has a population of about 10 million people, constituting more than one-sixth of Italy's population. Lombardy is ...
. Before his death, Gregory IX had called for a
synod A synod () is a council of a Christian denomination, usually convened to decide an issue of doctrine, administration or application. The word '' synod'' comes from the Ancient Greek () ; the term is analogous with the Latin word . Originally, ...
to denounce Frederick II, and the emperor had gone to great lengths to disrupt the gathering, including the imprisonment of captured prelates and cardinals. The conclave took place under the threat of the surrounding army of
Frederick II, Holy Roman Emperor Frederick II (, , , ; 26 December 1194 – 13 December 1250) was King of Sicily from 1198, King of Germany from 1212, King of Italy and Holy Roman Emperor from 1220 and King of Jerusalem from 1225. He was the son of Emperor Henry VI, Holy Roman ...
—before he pulled back to
Apulia Apulia ( ), also known by its Italian language, Italian name Puglia (), is a Regions of Italy, region of Italy, located in the Southern Italy, southern peninsular section of the country, bordering the Adriatic Sea to the east, the Strait of Ot ...
: Frederick II's retreat was meant to show that the Emperor "had made war with Gregory IX, and not with the Church"Gregorovius, 1906, p. 218.—who had been at odds with Gregory IX and then Celestine IV. Two cardinals had been sent to England (Oddo de Monferrato) and France (Giacomo da Pecorara, OCist.), in order to rally bishops and other prelates to attend Pope Gregory's Council. Since Frederick and his army held the Lombard plain and Tuscany, travelers would have to take the sea route. A navy was assembled by the two cardinals at Nice and Genoa, and despite warnings from the Genoese, they insisted on setting sail. They were met by Frederick's fleet off the tiny island of Giglio on 3 May 1241. They were sent to imprisonment in the Kingdom of Naples. The election took place in the Saepta Solis ('enclosure of the Sun') near the Clivus Scauri, an ancient complex that had been turned into a monastery. The cardinals were confined by Senator Matteo Rosso Orsini, the father of Giovanni Caetano Orsini (Pope Nicholas III), who had been appointed to his office by Pope Gregory IX. The conditions of the election were reported—by a contemporary author hostile to the Orsini—to have been stressful, with the urine of Orsini's guards on the rooftop leaking into the election chamber along with the rain. The actual forced confinement to the Saepta Solis took place only for the last two weeks of the conclave. It is even alleged that the citizens of Rome, angered by rumors that a non-Cardinal would be elected, threatened to dig up the corpse of
Pope Gregory IX Pope Gregory IX (; born Ugolino di Conti; 1145 – 22 August 1241) was head of the Catholic Church and the ruler of the Papal States from 19 March 1227 until his death in 1241. He is known for issuing the '' Decretales'' and instituting the Pa ...
and place it in the Saepta Solis with the cardinals. A different account states that Orsini himself threatened to have the corpse exhumed and displayed publicly in full papal regalia.


Cardinal electors

According to different accounts, the College of Cardinals on the death of Gregory IX numbered between 12 and 14 cardinals. The number of cardinal electors who actually voted in the final scrutiny was only 10.Kington-Oliphant, 1862, p. 303. At the time of Gregory IX's death, most of the cardinal electors who took part in the election were already present in Rome, and the two cardinals held prisoner by Frederick II were already captive in
Naples Naples ( ; ; ) is the Regions of Italy, regional capital of Campania and the third-largest city of Italy, after Rome and Milan, with a population of 908,082 within the city's administrative limits as of 2025, while its Metropolitan City of N ...
. The two cardinals had been apprehended at sea aboard captured Genoese galleys, while traveling to a general council that Gregory IX had called for
Easter Easter, also called Pascha ( Aramaic: פַּסְחָא , ''paskha''; Greek: πάσχα, ''páskha'') or Resurrection Sunday, is a Christian festival and cultural holiday commemorating the resurrection of Jesus from the dead, described in t ...
1241 to denounce Frederick II.Baumgartner, 2003, p. 35.Ullmann and Garnett, 2006, p. 259. Cardinal Colonna, however, was on one of his country estates near Palestrina when the Pope died. He had had a nasty fight with Gregory IX, and withdrew from the Curia. On his estate he had been holding consultations with the Emperor Frederick. When Gregory died, the Emperor, who was with his army at Grottaferrata, gave permission (licentia) for all cardinals outside Rome to return.


Absent cardinals


Proceedings

The main faction of cardinals was composed of the Gregorians ( Rinaldo Conti de Segni, Sinibaldo Fieschi, and Riccardo Annibaldi, who supported the election of Romano Bonaventura), who wished to continue Gregory IX's hostility towards the Holy Roman Emperor. Frederick II naturally objected to the election of Cardinal Romano Bonaventura due to his "persecution" of the
University of Paris The University of Paris (), known Metonymy, metonymically as the Sorbonne (), was the leading university in Paris, France, from 1150 to 1970, except for 1793–1806 during the French Revolution. Emerging around 1150 as a corporation associated wit ...
while legate to France, his alleged debauching of Queen Blanche of Castile, and his role in the dispute between Gregory IX and the emperor. The majority, however, including the "Moderates of the Opposition", including Giovanni Colonna, Robert Somercotes, and Rainiero Capocci, supported Cardinal Goffredo Castiglioni, who advised a policy of dealing with Frederick. When neither side was able to reach a two-thirds majority, required by the Constitution of Alexander III, the cardinals wrote to Frederick II and requested him to release the two cardinals whom he held captive. After the conclave had begun, the Emperor Frederick had had the two cardinals brought from Naples to Tivoli. However, when summoned to the Emperor's presence, rather than agree to the Emperor's conditions, Cardinal Giacomo da Pecorara proceeded to
excommunicate Excommunication is an institutional act of religious censure used to deprive, suspend, or limit membership in a religious community or to restrict certain rights within it, in particular those of being in communion with other members of the co ...
the Emperor yet once again. It was clear that the Cardinal would never cooperate, and he therefore remained in detention for two more years. Cardinal Oddone di Monferrato, however, was allowed to join the election, though he was required to leave hostages in his place and to promise to return to the Emperor's custody, unless he himself was elected pope or the deadlock continued. Frederick did not expect, of course, that the cardinals would elect Cardinal Oddo as pope; Frederick's own friends in the Conclave could and would prevent that. Nor did he ''want'' Cardinal Oddo to be elected. His real opinion of the Cardinal is revealed i
a letter he wrote
after the Battle of Giglio: as a Legate in England and France Oddo had conspired a good deal against the honor of the Emperor; he had raised a crowd of prelates to bring them to Rome to participate in Gregory IX's Council; in Genoa he had conspired against those Genoese who were supporters of Frederick; he had raised and armed a fleet to transport the prelates to Rome, and to reduce the Genoese. Cardinal Oddo was to be an instrument to break the deadlock in the meeting. Frederick II himself urged the cardinals to make a quick choice. ::Like serpents you cling to the earth instead of raising yourself to the skies. Each of you is aiming at the tiara, and no one of you is willing to leave it to the other. Renounce the spirit of faction and of discord! Let the college of cardinals give by unanimous choice to Christendom a pope who will satisfy us and the empire, and whose election will be for the universal good.Henderson, 1894, p. 386. The Emperor then, in September, returned to his kingdom by way of Campania, leaving the two cardinals at Tivoli under the custody of Tybboldus de Dragone. The heat and shortage of food may have contributed to the death of Cardinal Somercotes, although the other members of the pro-Imperial faction alleged that he had been poisoned. Cardinal Fieschi's health also deteriorated severely, apparently causing the future pope to inch closer to death. The remainder of the cardinals were not allowed to leave the Septisolium for the funeral, nor were physicians or servants allowed to enter the building (where a sizable amount of excrement had begun to build up). Bonaventura would also die some sixteen months after the election, which the vivid narrations gratuitously attribute to the effects of the Election. Cardinal Castiglione's advanced age and deteriorating health are thought to have contributed both to his status as '' papabile'' and his ultimate election, making him an ideal compromise candidate, "stop-gap",Kington-Oliphant, 1862, p. 304. or "provisional Pope". More polemical sources describe Celestine IV as a "feeble, ignorant, old fanatic" who was "destitute of any other qualification".''History of Popery'', 1838, p. 138. One commentator suggested that the cardinals "escaped by electing a dying man". Still others refer to him as "Orsini's candidate".Bordihn, 2005, p. 376.


Aftermath

Celestine IV died on Sunday, 10 November 1241, just 17 days after his election, even before he had been enthroned. It is possible that the cause of death was
dysentery Dysentery ( , ), historically known as the bloody flux, is a type of gastroenteritis that results in bloody diarrhea. Other symptoms may include fever, abdominal pain, and a feeling of incomplete defecation. Complications may include dehyd ...
, contracted in the Septasolium (Saepta Solis). It is speculated that had Celestine IV lived longer he "would in all likelihood have proven friendly to the emperor". Pope Celestine was buried on the day after his death, according to the custom. But, even before the funeral, certain cardinals fled the city, and headed for Anagni, the home of Cardinal Rinaldo dei Conti di Segni. It is said (by Matthew of Paris) that only six or seven cardinals were left in the city. Cardinal Colonna, however, was seized by the Roman populace, who supported the Orsini, and imprisoned due to his association with King Frederick. When confronted by a group of begging friars bearing a message from the
Archbishop of York The archbishop of York is a senior bishop in the Church of England, second only to the archbishop of Canterbury. The archbishop is the diocesan bishop of the Diocese of York and the metropolitan bishop of the province of York, which covers the ...
and
Bishop of Lincoln The Bishop of Lincoln is the Ordinary (officer), ordinary (diocesan bishop) of the Church of England Diocese of Lincoln in the Province of Canterbury. The present diocese covers the county of Lincolnshire and the unitary authority areas of Nort ...
, Frederick II reportedly said: "Who is hindering the welfare of the Church? Not I; but the stubborn pride and greediness of Romans. Who can wonder if I withstand the English and Roman Churches, which excommunicate me s Oddone had done from England defame me, and are always pouring forth money to do me wrong?" Soon after the conclave, the hostilities between the
Guelphs and Ghibellines The Guelphs and Ghibellines ( , ; ) were Political faction, factions supporting the Pope (Guelphs) and the Holy Roman Emperor (Ghibellines) in the Italian city-states of Central Italy and Northern Italy during the Middle Ages. During the 12th ...
resumed around the Italian peninsula, on both land and sea. Although Frederick II was now free to crush the
Lombards The Lombards () or Longobards () were a Germanic peoples, Germanic people who conquered most of the Italian Peninsula between 568 and 774. The medieval Lombard historian Paul the Deacon wrote in the ''History of the Lombards'' (written betwee ...
without a pope to oppose him, he soon diverted much of his cavalry and infantry north of the Alps where the
Tartars Tartary (Latin: ''Tartaria''; ; ; ) or Tatary () was a blanket term used in Western European literature and cartography for a vast part of Asia bounded by the Caspian Sea, the Ural Mountains, the Pacific Ocean, and the northern borders of China ...
had begun to seriously threaten his lands. Thus began the longest ''
sede vacante In the Catholic Church, ''sede vacante'' is the state during which a diocese or archdiocese is without a prelate installed in office, with the prelate's office being the cathedral. The term is used frequently in reference to a papal interre ...
'' in the history of the Roman Catholic Church since the period between Pope Agatho and Pope Leo II (681-682). It took a year and a half before the cardinals were successful in reconvening in
Anagni Anagni () is an ancient town and ''comune'' in the province of Frosinone, Lazio, in the hills east-southeast of Rome. It is a historical and artistic centre of the Latin Valley. Geography Overview Anagni still maintains the appearance of a s ...
(Frederick II was in possession of Rome) and electing a successor to Celestine IV, due in no small part to Frederick II's continuing to keep da Pecorara and Oddone as hostages:Watt, 1995, p. 112. choosing Cardinal Fieschi as Pope Innocent IV in 1243.Wright and Neil, 1904, p. 525. Innocent IV breathed new life into the conflict against Frederick II, and after the emperor's death in 1250, excommunicated his son and heir,
Conrad IV of Germany Conrad (25 April 1228 – 21 May 1254), a member of the Hohenstaufen dynasty, was the only son of Emperor Frederick II from his second marriage with Queen Isabella II of Jerusalem. He inherited the title of King of Jerusalem (as Conrad II) u ...
. Imperial influence in papal elections persisted until the
papal election, 1268–1271 The pope is the bishop of Rome and the visible head of the worldwide Catholic Church. He is also known as the supreme pontiff, Roman pontiff, or sovereign pontiff. From the 8th century until 1870, the pope was the sovereign or head of sta ...
, after which the Imperial party (then composed mostly of older cardinals) was all but extinguished within the
College of Cardinals The College of Cardinals (), also called the Sacred College of Cardinals, is the body of all cardinals of the Catholic Church. there are cardinals, of whom are eligible to vote in a conclave to elect a new pope. Appointed by the pope, ...
.


Problematical Accounts

One contemporary account of mixed reliability is that of British chronicler
Matthew Paris Matthew Paris, also known as Matthew of Paris (;  1200 – 1259), was an English people, English Benedictine monk, English historians in the Middle Ages, chronicler, artist in illuminated manuscripts, and cartographer who was based at St A ...
(c. 1200–1259), who claims that both his compatriot, Robert Somercotes, and Celestine IV died of poisoning; his works are more prized for their accounts of the
Hohenstaufen The Hohenstaufen dynasty (, , ), also known as the Staufer, was a noble family of unclear origin that rose to rule the Duchy of Swabia from 1079, and to royal rule in the Holy Roman Empire during the Middle Ages from 1138 until 1254. The dynast ...
struggles. Matthew was a friend of Cardinal Somercotes (who had once presided over the ''audientia litterarum contradictarum'' in Rome), and further claimed that Somercotes would have soon been elected pope himself had he survived. Such speculation appears from time to time in English literature; e.g. "the Italians were too hard for the honest Englishman, being made away by poison at the Holy Conclave, 1241," but it can be safely ignored. Accusations of poisoning of popes and cardinals, such as Innocent V and Adrian V, are a regular feature of chronicles in the 13th and 14th century.


Legacy

By virtue of the cardinals being locked in, the election is sometimes referred to as the " first conclave" (even the "first formal papal Conclave"), although the formal procedures of the conclave were not developed until after the
papal election, 1268–1271 The pope is the bishop of Rome and the visible head of the worldwide Catholic Church. He is also known as the supreme pontiff, Roman pontiff, or sovereign pontiff. From the 8th century until 1870, the pope was the sovereign or head of sta ...
, in the Constitution " Ubi Periculum" of Pope Gregory X (1274). Its provisions were first implemented in the papal conclave, January 1276. In fact, the practice of seclusion of the cardinal electors can perhaps even be traced back to the
papal election, 1216 The 1216 papal election (18 July), was convoked after the death of Pope Innocent III in Perugia (16 July 1216), elected Cardinal Cencio Camerario, who took the name of Honorius III. List of participants There were 25 cardinals in the College ...
, where the people of
Perugia Perugia ( , ; ; ) is the capital city of Umbria in central Italy, crossed by the River Tiber. The city is located about north of Rome and southeast of Florence. It covers a high hilltop and part of the valleys around the area. It has 162,467 ...
locked in the cardinals after the death of
Pope Innocent III Pope Innocent III (; born Lotario dei Conti di Segni; 22 February 1161 – 16 July 1216) was head of the Catholic Church and ruler of the Papal States from 8 January 1198 until his death on 16 July 1216. Pope Innocent was one of the most power ...
.Bernardus Guidonis, in Ludovico Antonio Muratori, ''Rerum Italicarum Scriptores'' III, p. 486], ''Perusinis causa electionis papae strictissime arctantibus cardinales'' ('the Perusines enclosed the cardinals very securely for the sake of the election of a pope'). That is the only reference in contemporary literature, and its meaning is vague. A. Bo. 1910. ''
Encyclopædia Britannica The is a general knowledge, general-knowledge English-language encyclopaedia. It has been published by Encyclopædia Britannica, Inc. since 1768, although the company has changed ownership seven times. The 2010 version of the 15th edition, ...
''. p. 828.


Notes


References

* Anonymous,
A History of Popery
'. 1838. London: John W. Parker. pp. 116–120. (a superficial, polemical, anti-Roman tract). *Baumgartner, Frederic J. 2003. ''Behind Locked Doors: A History of the Papal Elections''. Macmillan. . *Bernardus Guidonis, "Vita Coelestini Papae IV," in Ludovico Antonio Muratori, ''Rerum Italicarum Scriptores'' Tomus Tertius (Mediolani 1723) p. 589. *Bernardus Guidonis, "Vita Gregorii Papae IX," in Ludovico Antonio Muratori, ''Rerum Italicarum Scriptores'' Tomus Tertius (Mediolani 1723) pp. 570–588.
Bordihn, Maria
R. 2005. ''The Falcon of Palermo''. Atlantic Monthly Press. . *Butler, William Francis Thomas. 1906.
The Lombard Communes: A History of the Republics of North Italy
'. C. Scribner's Sons. *Duffy, Eamon. 2006. ''Saints and Sinners: a history of the popes''. Yale University Press. . *Gasquet, Fracis Aidan. 1905.
Henry the Third and the Church
'. G. Bell. * Gregorovius, Ferdinand. 1906.
History of the City of Rome in the Middle Ages
'. G. Bell. Volume V, part 1. *Hampe, K., "Ein ungedruckter Bericht über das Konklave von 1241," ''Sitzungsberichte. Heidelberger Akademie der Wissenschaften,.phil. hist. Klasse'' 4 (1913) 1-31. (the singl

stories of this papal election). *Henderson, Ernest Flagg. 1894.
A History of Germany in the Middle Ages
'. G. Bell and Sons. *Hilpert, Hans Eberhard. 1981. ''Kaiser- und Papstbriefe in den Chronica Majora des Mattheus Paris'' Stuttgart, Publications of the German Historical Institute, London, 9. *Huillard-Bréholles, J.-L.-A. (Editor). 1859–1860. ''Historia diplomatica Friderici Secundi'' Tomus V, Pars II (Parisiis: Henricus Plon 1859); Tomus VI. Pars I. a mense Septembri 1241 ad mensem Julium 1247 (Paris: Plon 1860). *Kantorowitz, Ernest. 1931. ''Frederick the Second, 1194-1250''. New York. *Kington-Oliphant, Thomas Laurence. 1862.
History of Frederick the Second, Emperor of the Romans
'. Macmillan. *Kühner, Hans. 1958. ''Encyclopedia of the Papacy''. Philosophical Library. *Levillain, Philippe. 2002. ''The Papacy: An Encyclopedia''. Routledge. . *Lewis, Suzanne. 1987. ''The Art of Matthew Paris in the Chronica Majora''. Berkeley-Los Angeles. University of California Press. *Luard, Henry Richards (editor), 1880. ''Matthaei Parisiensis, Monachi Sancti Albani, Chronica Majora'' Vol. IV. A.D. 1248 to A. D. 1258 (London: Longman 1880) *Nicolaus de Curbio, O.Min., "Vita Innocentii Papae IV," in Ludovico Antonio Muratori, ''Rerum Italicarum Scriptores'' Tomus Tertius (Mediolani 1723) pp. 592–592e. *Parravicini Bagliani, A., ''Cardinali di curia e "familiae" cardinaliste, dal 1227 al 1254'' Volume II (Padua 1972). *Pham, John-Peter. 2006. ''Heirs of the Fisherman: Behind the Scenes of Papal Death and Succession''. Oxford University Press. . *Rotberg, Robert I. 2001. ''Politics and Political Change: A Journal of Interdisciplinary History Reader''. MIT Press. . *Tobin, Greg, and Wister, Robert J. 2003. ''Selecting the Pope: Uncovering the Mysteries of Papal Elections''. Barnes & Noble Publishing. . *Ullmann, Walter, and Garnett, George. 2003. ''A Short history of the papacy in the Middle Ages''. Routledge. . *Watt, J. A. 1995. "Chapter 5: The Papacy" in ''The New Cambridge Medieval History''. Cambridge University Press. . *Williams, Henry Smith. 1908.
The Historians' History of the World
'. Hooper and Jackson. *Williamson, Dorothy M. 1949. "Some Aspects of the Legation of Cardinal Otto in England, 1233-1241," ''English Historical Review'' 64. pp. 145–173. *Wright, Charles Henry Hamilton, and Neil, Charles. 1904.
A Protestant Dictionary
'. Hodder and Stoughton.

(Dr. J. P. Adams) {{Subject bar , portal1= Catholicism , portal2= Christianity , portal3= Vatican City , b=y, b-search=Biblical Studies/Christianity/Roman Catholicism/History , commons=y, commons-search=Papal conclave , n=y, n-search=Roman Catholic Church , q=y, q-search=Popes , s=y, s-search=Popes , v=y, v-search=Christian History , wikt=y, wikt-search=Pope , d=y 13th-century elections 1241
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