Pope John XXI (, , ; – 20 May 1277), born Pedro Julião (), was 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 ...
and ruler of the
Papal States from 8 September 1276 to his death in May 1277. He is the only ethnically
Portuguese pope in history.
[Richard P. McBrien, ''Lives of the Popes'', (Harper Collins, 1997), 222.] He is sometimes identified with the
logician and herbalist
Peter of Spain (; ), which would make him the only pope to have been a physician.
Early life
Pedro Julião was born in
Lisbon
Lisbon ( ; ) is the capital and largest city of Portugal, with an estimated population of 567,131, as of 2023, within its administrative limits and 3,028,000 within the Lisbon Metropolitan Area, metropolis, as of 2025. Lisbon is mainlan ...
between 1210 and 1220 to Julião Pais, chancellor of
Afonso Henriques and
Sancho I, and his wife Mor Mendes. He started his studies at the episcopal school of
Lisbon Cathedral and later joined the
University of Paris, although some historians claim that he was educated at
Montpellier. Wherever he studied, he concentrated on
medicine
Medicine is the science and Praxis (process), practice of caring for patients, managing the Medical diagnosis, diagnosis, prognosis, Preventive medicine, prevention, therapy, treatment, Palliative care, palliation of their injury or disease, ...
,
theology
Theology is the study of religious belief from a Religion, religious perspective, with a focus on the nature of divinity. It is taught as an Discipline (academia), academic discipline, typically in universities and seminaries. It occupies itse ...
,
logic,
physics
Physics is the scientific study of matter, its Elementary particle, fundamental constituents, its motion and behavior through space and time, and the related entities of energy and force. "Physical science is that department of knowledge whi ...
,
metaphysics
Metaphysics is the branch of philosophy that examines the basic structure of reality. It is traditionally seen as the study of mind-independent features of the world, but some theorists view it as an inquiry into the conceptual framework of ...
, and
Aristotle
Aristotle (; 384–322 BC) was an Ancient Greek philosophy, Ancient Greek philosopher and polymath. His writings cover a broad range of subjects spanning the natural sciences, philosophy, linguistics, economics, politics, psychology, a ...
's
dialectic. He is traditionally and usually identified with the medical author
Peter of Spain, an important figure in the development of logic and
pharmacology. Peter of Spain taught at the
University of Siena in the 1240s and his ' was used as a university textbook on
Aristotelian logic
In logic and formal semantics, term logic, also known as traditional logic, syllogistic logic or Aristotelian logic, is a loose name for an approach to formal logic that began with Aristotle and was developed further in ancient history mostly b ...
for the next three centuries. At the court in Lisbon, he was the councilor and spokesman for
King Afonso III in church matters. Later, he became
prior of Guimarães.
He was Archdeacon of Vermoim (Vermuy) in the Archdiocese of Braga. He tried to become
bishop of Lisbon but was defeated. Instead, he became the Master of the school of Lisbon. Peter became the physician of
Pope Gregory X (1271–1276) early in his reign. In March 1273, he was elected Archbishop of
Braga, but did not assume that post; instead, on 3 June 1273,
Pope Gregory X created him
Cardinal Bishop of Tusculum (Frascati).
Papacy
After the death of
Pope Adrian V on 18 August 1276, Peter was
elected pope on 8 September.
He was crowned a week later on 20 September. One of John XXI's few acts during his brief reign was the reversal of a decree recently passed at the
Second Council of Lyon (1274); the decree had not only confined cardinals in solitude until they elected a successor pope, but also progressively restricted their supplies of food and wine if their deliberations took too long. Though much of John XXI's brief papacy was dominated by the powerful Cardinal Giovanni Gaetano Orsini, who succeeded him as
Pope Nicholas III, John attempted to launch a
crusade for the
Holy Land, pushed for a union with the Eastern church, and did what he could to maintain peace between the Christian nations.
Among his other acts, he excommunicated
Afonso III of Portugal for interfering with episcopal elections and sent legates to
Kublai Khan. He also launched a
mission to convert the
Tatars, but he died before it could start.
To secure the necessary quiet for his medical studies, he had an apartment added to the papal palace at
Viterbo, to which he could retire when he wished to work undisturbed. On 14 May 1277, while the pope was alone in this apartment, the ceiling collapsed; John was rescued alive from beneath the rubble; however, he died of his serious injuries on 20 May, possibly an early recorded case of
crush syndrome.
He was buried in the
Duomo di Viterbo, where his tomb can still be seen. The original
porphyry sarcophagus was destroyed during the cathedral's 16th-century refurbishment, and was replaced with a more modest one in stone with the pope's effigy. In the 19th century, the
Duke of Saldanha, as Portuguese Ambassador to the Holy See, had the pope's remains transferred to a new sarcophagus sculpted by
Filippo Gnaccarini.
In 2000, the
Lisbon
Lisbon ( ; ) is the capital and largest city of Portugal, with an estimated population of 567,131, as of 2023, within its administrative limits and 3,028,000 within the Lisbon Metropolitan Area, metropolis, as of 2025. Lisbon is mainlan ...
City Council, led by Mayor
João Soares, successfully had a new funeral monument built in
lioz stone, topped by the original stone effigy of the pope, placed in a more condign location in the
transept.
Legacy
After his death, it was rumored that John XXI had actually been a
necromancer, a suspicion frequently directed towards the few scholars among medieval popes (see, e.g.,
Sylvester II). It was also said that his death had been an
act of God, stopping him from completing a
heretical treatise.
[ Odorico Raynaldi, ''sub anno'' 1227, no. 19.] Since the works of "Peter of Spain" continued to be studied and appreciated, however,
Dante Alighieri placed "Pietro Spano" in his ''
Paradiso's''
Sphere of the Sun with the spirits of other great religious scholars.
See also
*
List of popes
Notes
References
Bibliography
*
* Guiraud, J. and L. Cadier (editors), ''Les registres de Grégoire X et de Jean XXI (1271–1277)'' (Paris, 1892–1898)
ibliothèque de l'Ecole française à Rome, série 2, 12(in Latin)
* Walter, Fritz, ''Die Politik der Kurie unter Gregor X'' (Berlin, 1894) (in German)
* Stapper, Richard, ''Papst Johannes XXI. Eine Monographie'' (Münster 1898)
irchengeschichtliche Studien, volume 4, no. 4(in German)
* Gregorovius, Ferdinand, ''History of Rome in the Middle Ages'', volume V, part 2, second edition, revised (London: George Bell, 1906)
* H. D. Sedgwick, ''Italy in the Thirteenth Century'' Volume II (Boston-New York, 1912)
* Mazzi-Belli, V., "Pietro Hispano papa Giovanni XXI," ''Rivista di storia della medicina'' 15 (1971), 39–87 (in Italian)
* Morceau, Joseph, "Un pape portugais : Jean XXI, dénommé Pierre d'Espagne", ''Teoresi'' 24 (1979), 391–407 (in French)
* Maxwell-Stuart, P. G. ''Chronicle of the Popes: The Reign-by-Reign Record of the Papacy from St. Peter to the Present'', Thames & Hudson, 2002, p. 119. .
*
*
* Jean Claude Bologne: ''La Naissance Interdite; stérilité, avortement, contraception au Moyen-Age''. Orban, Paris, 1988 .
*
*
Joachim Telle: ''Petrus Hispanus in der altdeutschen Medizinliteratur und Texte unter besonderer Berücksichtigung des Thesaurus pauperum‘.'' 2 vol., Heidelberg, 1972.
External links
*
*
* J. P. Kirsch
Art. ''Pope John XXI (XX)'' in: The Catholic Encyclopedia, Vol. VIII (1910)
* Salvino Leone:
* Joke Spruyt
''Peter of Spain''(2001), in: Stanford Encyclopedia of Philosophy
{{DEFAULTSORT:John 21
Popes
Portuguese cardinals
John XXI
Bishops of Braga
Cardinal-bishops of Frascati
13th-century Roman Catholic bishops in Portugal
Roman Catholic archbishops of Braga
13th-century writers in Latin
John XXI
John XXI
John XXI
John XXI
Academic staff of the University of Siena
Viterbo Papacy
13th-century popes
Characters in the Divine Comedy