Pope Clement IV (; 23 November 1190 – 29 November 1268), born Gui Foucois (; or ') and also known as Guy le Gros (
French for "Guy the Fat"; ), was
bishop of Le Puy
The Diocese of Le Puy-en-Velay (Latin: ''Dioecesis Aniciensis''; French: ''Diocèse du Puy-en-Velay'' ) is a Latin diocese of the Catholic Church in France. The diocese comprises the whole Department of Haute-Loire, in the Region of Auvergne-R ...
(1257–1260),
archbishop of Narbonne (1259–1261),
cardinal of Sabina (1261–1265), and head of the
Catholic Church
The Catholic Church (), also known as the Roman Catholic Church, is the List of Christian denominations by number of members, largest Christian church, with 1.27 to 1.41 billion baptized Catholics Catholic Church by country, worldwid ...
from 5 February 1265 until his death.
His election as pope occurred at a conclave held at
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 ...
that lasted four months while cardinals argued over whether to call in
Charles I of Anjou
Charles I (early 1226/12277 January 1285), commonly called Charles of Anjou or Charles d'Anjou, was King of Sicily from 1266 to 1285. He was a member of the royal Capetian dynasty and the founder of the House of Anjou-Sicily. Between 1246 a ...
, the youngest brother of
Louis IX of France
Louis IX (25 April 1214 – 25 August 1270), also known as Saint Louis, was King of France from 1226 until his death in 1270. He is widely recognized as the most distinguished of the Direct Capetians. Following the death of his father, Louis VI ...
, to carry on the papal war against 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 ...
s. Pope Clement was a patron of
Thomas Aquinas
Thomas Aquinas ( ; ; – 7 March 1274) was an Italian Dominican Order, Dominican friar and Catholic priest, priest, the foremost Scholasticism, Scholastic thinker, as well as one of the most influential philosophers and theologians in the W ...
and of
Roger Bacon
Roger Bacon (; or ', also '' Rogerus''; ), also known by the Scholastic accolades, scholastic accolade ''Doctor Mirabilis'', was a medieval English polymath, philosopher, scientist, theologian and Franciscans, Franciscan friar who placed co ...
, encouraging Bacon in the writing of his ''
Opus Majus'', which included important treatises on
optics
Optics is the branch of physics that studies the behaviour and properties of light, including its interactions with matter and the construction of optical instruments, instruments that use or Photodetector, detect it. Optics usually describes t ...
and the
scientific method
The scientific method is an Empirical evidence, empirical method for acquiring knowledge that has been referred to while doing science since at least the 17th century. Historically, it was developed through the centuries from the ancient and ...
.
Life before election
Clement was born in
Saint-Gilles-du-Gard in the
County of Toulouse, to a successful lawyer, Pierre Foucois, and his wife Marguerite Ruffi. At the age of nineteen, he enrolled as a soldier to fight the Moors in Spain. He then pursued the study of law in Toulouse, Bourges and Orleans, becoming a noted advocate in Paris. In the latter capacity he acted as secretary to
King Louis IX, to whose influence he was chiefly indebted for his elevation to the cardinalate. He married the daughter of Simon de Malbois and had two daughters. Upon the death of his wife, he followed his father's example and gave up secular life for the Church.
[Loughlin, James. "Pope Clement IV." The Catholic Encyclopedia]
Vol. 4. New York: Robert Appleton Company, 1908. 2 January 2016
His rise was rapid. Ordained in the , Paris, he became pastor of Saint-Gilles in 1255. In 1257, he was appointed
Bishop of Le Puy
The Diocese of Le Puy-en-Velay (Latin: ''Dioecesis Aniciensis''; French: ''Diocèse du Puy-en-Velay'' ) is a Latin diocese of the Catholic Church in France. The diocese comprises the whole Department of Haute-Loire, in the Region of Auvergne-R ...
; in 1259, he was appointed
Archbishop of Narbonne; and in December 1261, he became the first cardinal created by
Pope Urban IV
Pope Urban IV (; c. 1195 – 2 October 1264), born Jacques Pantaléon, was head of the Catholic Church and ruler of the Papal States from 29 August 1261 to his death three years later. He was elected pope without being a cardinal; he was the fi ...
, for the
See of Sabina. He was the
papal legate
300px, A woodcut showing Henry II of England greeting the Pope's legate.
A papal legate or apostolic legate (from the ancient Roman title '' legatus'') is a personal representative of the Pope to foreign nations, to some other part of the Catho ...
in England between 1262 and 1264.
[ He was named a cardinal ( grand penitentiary) in 1263.]
Pontificate
In this period, the See of Rome
See or SEE may refer to:
* Visual perception
Arts, entertainment, and media
* Music:
** ''See'' (album), studio album by rock band The Rascals
*** "See", song by The Rascals, on the album ''See''
** "See" (Tycho song), song by Tycho
* Televisio ...
was engaged in a conflict with Manfred, King of Sicily
Manfred (; 123226 February 1266) was the last King of Sicily from the Hohenstaufen dynasty, reigning from 1258 until his death. The natural son of the Holy Roman Emperor Frederick II, Manfred became regent over the Kingdom of Sicily on beh ...
, the illegitimate son and designated heir of 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 ...
Frederick II of Hohenstaufen, but whom papal loyalists, the Guelfs, called "the usurper of 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 ...
". Clement IV, who was in France at the time of his election
An election is a formal group decision-making process whereby a population chooses an individual or multiple individuals to hold Public administration, public office.
Elections have been the usual mechanism by which modern representative d ...
, was compelled to enter Italy
Italy, officially the Italian Republic, is a country in Southern Europe, Southern and Western Europe, Western Europe. It consists of Italian Peninsula, a peninsula that extends into the Mediterranean Sea, with the Alps on its northern land b ...
in disguise. He immediately took steps to ally himself with Charles of Anjou, his erstwhile patron's brother and the impecunious French claimant to the Neapolitan throne. Charles was willing to recognize the Pope as his feudal overlord (a bone of contention with the Hohenstaufens) and was crowned by cardinals in Rome
Rome (Italian language, Italian and , ) is the capital city and most populated (municipality) of Italy. It is also the administrative centre of the Lazio Regions of Italy, region and of the Metropolitan City of Rome. A special named with 2, ...
, where Clement IV, permanently established at Viterbo
Viterbo (; Central Italian, Viterbese: ; ) is a city and ''comune'' (municipality) in the Lazio region of Italy, the Capital city, capital of the province of Viterbo.
It conquered and absorbed the neighboring town of Ferento (see Ferentium) in ...
, dared not venture, since the anti-papal Ghibelline party was so firmly in control there.[
Then, fortified with papal money and supplies, Charles marched into Naples. Having defeated and slain Manfred in the great ]Battle of Benevento
The Battle of Benevento was a major medieval battle fought on 26 February 1266, near Benevento in present-day Southern Italy, between the forces of Charles I of Anjou and those of King Manfred of Sicily. Manfred's defeat and death resulted in C ...
, Charles established himself firmly in the kingdom of Sicily
Sicily (Italian language, Italian and ), officially the Sicilian Region (), is an island in the central Mediterranean Sea, south of the Italian Peninsula in continental Europe and is one of the 20 regions of Italy, regions of Italy. With 4. ...
at the conclusive Battle of Tagliacozzo, in which Conradin
Conrad III (25 March 1252 – 29 October 1268), called ''the Younger'' or ''the Boy'', but usually known by the diminutive Conradin (, ), was the last direct heir of the House of Hohenstaufen. He was Duke of Swabia (1254–1268) and nominal King ...
, the last of the house of 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 ...
, was taken prisoner. Clement IV is said to have disapproved of the cruelties committed by his protégé, but the statement by Gregorovius that Clement IV became an accomplice by refusing to intercede for the unfortunate Conradin whom Charles had beheaded in the marketplace of Naples seems contentious. However, Gregorovius may be basing this conclusion on the position of Urban IV's predecessors, Innocent IV and Alexander IV, who were Conradin's official guardians.
Acts
In 1264, Clement IV renewed the prohibition of the Talmud
The Talmud (; ) is the central text of Rabbinic Judaism and the primary source of Jewish religious law (''halakha'') and Jewish theology. Until the advent of Haskalah#Effects, modernity, in nearly all Jewish communities, the Talmud was the cen ...
promulgated by 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 P ...
, who had it publicly burnt in France and in Italy. Though Clement did not condemn to death at the stake those who harboured copies of it, and, responding to a denunciation of the Talmud by Pablo Christiani, he ordered that the Jews of the Crown of Aragon
The Crown of Aragon (, ) ;, ; ; . was a composite monarchy ruled by one king, originated by the dynastic union of the Kingdom of Aragon and the County of Barcelona (later Principality of Catalonia) and ended as a consequence of the War of the Sp ...
submit their books to Dominican censors for expurgation.
In February 1265 Clement summoned Thomas Aquinas
Thomas Aquinas ( ; ; – 7 March 1274) was an Italian Dominican Order, Dominican friar and Catholic priest, priest, the foremost Scholasticism, Scholastic thinker, as well as one of the most influential philosophers and theologians in the W ...
to Rome to serve as papal theologian. It was during this period that Aquinas also served as regent master for the Dominicans at Rome. With the arrival of Aquinas the existing ''studium conventuale'' at Santa Sabina
The Basilica of Saint Sabina (, ) is a historic church on the Aventine Hill in Rome, Italy. It is a titular minor basilica and mother church of the Roman Catholic Order of Preachers, better known as the Dominicans.
Santa Sabina is the oldest ex ...
, which had been founded in 1222, was transformed into the Order's first ''studium provinciale'' featuring the study of philosophy (''studia philosophiae'') as prescribed by Aquinas and others at the chapter of Valenciennes
Valenciennes (, also , , ; ; or ; ) is a communes of France, commune in the Nord (French department), Nord Departments of France, department, Hauts-de-France, France.
It lies on the Scheldt () river. Although the city and region experienced ...
in 1259, an intermediate school between the ''studium conventuale'' and the ''studium generale''. This ''studium'' was the forerunner of the 16th century College of Saint Thomas at Santa Maria sopra Minerva
Santa Maria sopra Minerva is one of the major Church (building), churches of the Order of Preachers (also known as the Dominicans) in Rome, Italy. The church's name derives from the fact that the first Christian church structure on the site was b ...
and the Pontifical University of Saint Thomas Aquinas, ''Angelicum''. In 1266, after the Battle of Benevento
The Battle of Benevento was a major medieval battle fought on 26 February 1266, near Benevento in present-day Southern Italy, between the forces of Charles I of Anjou and those of King Manfred of Sicily. Manfred's defeat and death resulted in C ...
, Pope Clement IV conceded for gratitude his coat of arms to the Guelph Party of Florence
Florence ( ; ) is the capital city of the Italy, Italian region of Tuscany. It is also the most populated city in Tuscany, with 362,353 inhabitants, and 989,460 in Metropolitan City of Florence, its metropolitan province as of 2025.
Florence ...
as official approval to their supremacy and therefore they could take power in many of the other northern Italian cities. In 1267–68 Clement engaged in correspondence with the Mongol Ilkhanate
The Ilkhanate or Il-khanate was a Mongol khanate founded in the southwestern territories of the Mongol Empire. It was ruled by the Il-Khans or Ilkhanids (), and known to the Mongols as ''Hülegü Ulus'' (). The Ilkhanid realm was officially known ...
rule Abaqa. The latter proposed a Franco-Mongol alliance
Several attempts at a military alliance between the Franks#Crusaders and other Western Europeans as "Franks", Frankish Crusaders and the Mongol Empire against the Islamic caliphates, their common enemy, were made by various leaders among them dur ...
between his forces, those of the West, and the Byzantine emperor
The foundation of Constantinople in 330 AD marks the conventional start of the Eastern Roman Empire, which Fall of Constantinople, fell to the Ottoman Empire in 1453 AD. Only the emperors who were recognized as legitimate rulers and exercised s ...
Michael VIII Palaeologos (Abaqa's father-in-law). Pope Clement welcomed Abaqa's proposal in a non-committal manner, but did inform him of an upcoming Crusade. In 1267, Pope Clement IV and King James I of Aragon
James I the Conqueror ( Catalan/Valencian: ''Jaume I or Jaume el Conqueridor''; Aragonese: ''Chaime I'' ''o Conqueridor''; ; 2 February 1208 – 27 July 1276) was King of Aragon, Count of Barcelona, and Lord of Montpellier from 1213 to 1 ...
sent an ambassador to the Mongol ruler Abaqa in the person of Jayme Alaric de Perpignan. In his 1267 letter written from Viterbo, the Pope wrote:
Although Clement's successors continued to engage in diplomatic contacts with the Mongols for the rest of the century, they were never able to coordinate an actual alliance.["Despite numerous envoys and the obvious logic of an alliance against mutual enemies, the papacy and the Crusaders never achieved the often-proposed alliance against Islam". Atwood, "Western Europe and the Mongol Empire" ''Encyclopedia of Mongolia and the Mongol Empire'', p. 583]
Death and burial
Within months Clement IV was dead as well, and was buried at the Dominican convent, Santa Maria in Gradi, just outside Viterbo
Viterbo (; Central Italian, Viterbese: ; ) is a city and ''comune'' (municipality) in the Lazio region of Italy, the Capital city, capital of the province of Viterbo.
It conquered and absorbed the neighboring town of Ferento (see Ferentium) in ...
, where he resided throughout his pontificate. In 1885, his remains were transferred to the church, San Francesco alla Rocca, in Viterbo.[Richard P. McBrien, 218.] Owing to irreconcilable divisions among the cardinals, the papal throne remained vacant for nearly three years.
Clement IV's private character was praised by contemporaries for his asceticism, and he is especially commended for his indisposition to promote and enrich his own relatives. He also ordered the Franciscan scholar Roger Bacon
Roger Bacon (; or ', also '' Rogerus''; ), also known by the Scholastic accolades, scholastic accolade ''Doctor Mirabilis'', was a medieval English polymath, philosopher, scientist, theologian and Franciscans, Franciscan friar who placed co ...
to write the '' Opus Majus'', which is addressed to him.
See also
*List of popes
This chronological list of the popes of the Catholic Church corresponds to that given in the under the heading "" (The Roman Supreme Pontiffs), excluding those that are explicitly indicated as antipopes. Published every year by the Roman Curia ...
References
Citations
Bibliography
*
*
*
* Jean Dunbabin, ''Charles I of Anjou: Power, Kingship and State-Making in Thirteenth-Century Europe'' (Addison Wesley Longman 1998; London-New York: Routledge 2014).
External links
*
*
*
Le pape, le roy et l'alchimiste : Clémént IV – saint Louis – Roger Bacon
by Laurent Ryder
{{DEFAULTSORT:Clement 04
1195 births
1268 deaths
People from Saint-Gilles, Gard
Cardinals created by Pope Urban IV
Popes
French popes
Diplomats for the Holy See
Cardinal-bishops of Sabina
Bishops of Le Puy-en-Velay
Archbishops of Narbonne
13th-century Roman Catholic archbishops in France
Major Penitentiaries of the Apostolic Penitentiary
Viterbo Papacy
Year of birth unknown
13th-century popes