Pope Gregory XIII (, , born Ugo Boncompagni; 7 January 1502 – 10 April 1585) 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
The Papal States ( ; ; ), officially the State of the Church, were a conglomeration of territories on the Italian peninsula under the direct sovereign rule of the pope from 756 to 1870. They were among the major states of Italy from the 8th c ...
from 13 May 1572 to his death in April 1585. He is best known for commissioning and being the namesake for the
Gregorian calendar
The Gregorian calendar is the calendar used in most parts of the world. It went into effect in October 1582 following the papal bull issued by Pope Gregory XIII, which introduced it as a modification of, and replacement for, the Julian cale ...
, which remains the internationally accepted
civil calendar
The civil calendar is the calendar, or possibly one of several calendars, used within a country for civil, official, or administrative purposes. The civil calendar is almost always used for general purposes by people and private organizations.
Th ...
to this day.
Early biography
Youth
Ugo Boncompagni was born the son of Cristoforo
Boncompagni
The House of Boncompagni is a princely family of the Italian nobility which settled in Bologna in around the 14th century, but was probably originally from Umbria.
In 1572 Ugo Boncompagni was elected pope, taking the name Pope Gregory XIII, Greg ...
(10 July 1470 – 1546) and Angela Marescalchi, and paternal grandson of Giacomo Boncompagni and Camilla Piattesi, in
Bologna
Bologna ( , , ; ; ) is the capital and largest city of the Emilia-Romagna region in northern Italy. It is the List of cities in Italy, seventh most populous city in Italy, with about 400,000 inhabitants and 150 different nationalities. Its M ...
, where he studied law and graduated in 1530. He later taught jurisprudence for some years, and his students included notable figures such as Cardinals
Alexander Farnese,
Reginald Pole
Reginald Pole (12 March 1500 – 17 November 1558) was an English cardinal and the last Catholic Archbishop of Canterbury, holding the office from 1556 to 1558 during the Marian Restoration of Catholicism.
Early life
Pole was born at Stourt ...
and
Charles Borromeo
Charles Borromeo (; ; 2 October 1538 – 3 November 1584) was an Catholic Church in Italy, Italian Catholic prelate who served as Archdiocese of Milan, Archbishop of Milan from 1564 to 1584. He was made a Cardinal (Catholicism), cardinal in 156 ...
. He had an illegitimate son after an affair with Maddalena Fulchini,
Giacomo Boncompagni
Giacomo Boncompagni (also ''Jacopo Boncompagni''; 8 May 1548 – 18 August 1612) was an Italian feudal lord of the 16th century, the illegitimate son of Pope Gregory XIII (Ugo Boncompagni). He was also Duke of Sora, Aquino, Arce and Arpino, a ...
, but before he took holy orders, making him the last Pope to have left issue.
Career before papacy
At the age of 36 he was summoned to Rome by
Pope Paul III
Pope Paul III (; ; born Alessandro Farnese; 29 February 1468 – 10 November 1549) was head of the Catholic Church and ruler of the Papal States from 13 October 1534 to his death, in November 1549.
He came to the papal throne in an era follo ...
(1534–1549), under whom he held successive appointments as first judge of the capital,
abbreviator An abbreviator (plural "abbreviators" in English, ''abbreviatores'' in Latin) or breviator was a writer of the Papal Chancery who adumbrated and prepared in correct form Papal bulls, briefs, and consistorial decrees before these were written out ' ...
, and vice-chancellor of the
Campagna e Marittima
The Campagna and Marittima Province (Latin ''Campaniæ Maritimæque Provincia'', Italian ''Provincia di Campagna e Marittima'') was one of the seven provinces of the Papal States from the 12th century to the end of the 18th.
The province was esta ...
.
Pope Paul IV
Pope Paul IV (; ; 28 June 1476 – 18 August 1559), born Gian Pietro Carafa, was head of the Catholic Church and ruler of the Papal States from 23 May 1555 to his death, in August 1559. While serving as papal nuncio in Spain, he developed ...
(1555–1559) attached him as ''
datarius'' to the suite of Cardinal
Carlo Carafa
Carlo Carafa (29 March 1517 – 6 March 1561) was an Italian cardinal, and Cardinal Nephew of Pope Paul IV Carafa, whose policies he directed and whom he served as papal legate in Paris, Venice and Brussels.
Early years
He was born at Naple ...
.
Pope Pius IV
Pope Pius IV (; 31 March 1499 – 9 December 1565), born Giovanni Angelo Medici, was head of the Catholic Church and ruler of the Papal States from 25 December 1559 to his death, in December 1565. Born in Milan, his family considered itself a b ...
(1559–1565) made him
Cardinal-Priest
A cardinal is a senior member of the clergy of the Catholic Church. As titular members of the clergy of the Diocese of Rome, they serve as advisors to the pope, who is the bishop of Rome and the visible head of the worldwide Catholic Church. ...
of
San Sisto Vecchio
The Basilica of San Sisto Vecchio (in Via Appia) is a Catholic minor basilica and Dominican conventual church in Rome, Italy
Italy, officially the Italian Republic, is a country in Southern Europe, Southern and Western Europe, Western ...
and sent him to the
Council of Trent
The Council of Trent (), held between 1545 and 1563 in Trent (or Trento), now in northern Italy, was the 19th ecumenical council of the Catholic Church. Prompted by the Protestant Reformation at the time, it has been described as the "most ...
.
In the year 1552, Ugo Boncompagni confirmed the paternity of his son Giacomo (or Jacopo). As stated in the online Archivio Digitale Boncompagni Ludovisi: "One of the most valuable items to emerge from the new archival finds from the
Villa Aurora is an autograph declaration in Latin and Italian dated 22 December 1552 by Ugo Boncompagni (1502–1585, from 1572 Pope Gregory XIII). Here Ugo confirms his paternity of
Giacomo (or Jacopo) Boncompagni (1548–1612) by Maddalena de' Fucchinis, a servant in the employ of his sister-in-law Laura Ferro. The future Pope explains in detail the circumstances of the boy's conception, which took place in 1547 in
Bologna
Bologna ( , , ; ; ) is the capital and largest city of the Emilia-Romagna region in northern Italy. It is the List of cities in Italy, seventh most populous city in Italy, with about 400,000 inhabitants and 150 different nationalities. Its M ...
after the Council of Trent had moved to that city; his motive was to assure his inheritance rights following the death (in 1546) of his father Cristoforo Boncompagni."
He also served as a legate to
Philip II of Spain
Philip II (21 May 152713 September 1598), sometimes known in Spain as Philip the Prudent (), was King of Spain from 1556, King of Portugal from 1580, and King of Naples and List of Sicilian monarchs, Sicily from 1554 until his death in 1598. He ...
(1556–1598), being sent by the Pope to investigate the
Archbishop of Toledo
The Archdiocese of Toledo () is a Latin Church archdiocese of the Catholic Church located in Spain. Bartolomé Carranza. He formed a lasting and close relationship with the Spanish king, which aided his foreign policy aims as Pope.
Election as pope
After Pope Pius V (1566–1572) died, the
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 ...
chose Cardinal Boncompagni, who assumed the name of Gregory XIII in homage to
Gregory the Great
Pope Gregory I (; ; – 12 March 604), commonly known as Saint Gregory the Great (; ), was the 64th Bishop of Rome from 3 September 590 until his death on 12 March 604. He is known for instituting the first recorded large-scale mission from Rom ...
, a 6th-century reforming pope. It was a very brief conclave, lasting less than 24 hours. Many historians have attributed this to the influence and backing of the Spanish king.
Charles Borromeo
Charles Borromeo (; ; 2 October 1538 – 3 November 1584) was an Catholic Church in Italy, Italian Catholic prelate who served as Archdiocese of Milan, Archbishop of Milan from 1564 to 1584. He was made a Cardinal (Catholicism), cardinal in 156 ...
and the cardinals wishing reform accepted Boncompagni's candidature and so supported him in the conclave, while the Spanish faction also deemed him acceptable due to his success as a
nuncio
An apostolic nuncio (; also known as a papal nuncio or simply as a nuncio) is an ecclesiastical diplomat, serving as an envoy or a permanent diplomatic representative of the Holy See to a state or to an international organization. A nuncio is ...
in Spain.
Pontificate
Reform of the Church

Once in the chair of
Saint Peter
Saint Peter (born Shimon Bar Yonah; 1 BC – AD 64/68), also known as Peter the Apostle, Simon Peter, Simeon, Simon, or Cephas, was one of the Twelve Apostles of Jesus and one of the first leaders of the Jewish Christian#Jerusalem ekklēsia, e ...
, Gregory XIII dedicated himself to reform of the Catholic Church. He implemented the recommendations of the
Council of Trent
The Council of Trent (), held between 1545 and 1563 in Trent (or Trento), now in northern Italy, was the 19th ecumenical council of the Catholic Church. Prompted by the Protestant Reformation at the time, it has been described as the "most ...
. He mandated that cardinals reside in their
sees without exception, and designated a committee to update the
Index of Forbidden Books
The (English: ''Index of Forbidden Books'') was a changing list of publications deemed heretical or contrary to morality by the Sacred Congregation of the Index (a former dicastery of the Roman Curia); Catholics were forbidden to print o ...
. Gregory XIII was also the patron of a new and greatly improved edition of the . In a time of considerable centralization of power, Gregory XIII abolished the Cardinals
Consistories, replacing them with Colleges and appointing specific tasks for these colleges to work on. He was renowned for fierce independence; some confidants noted that he neither welcomed interventions nor sought advice. The power of the papacy increased under him, whereas the influence and power of the cardinals substantially decreased.
Gregory XIII also established the
Discalced Carmelites
The Discalced Carmelites, known officially as the Order of the Discalced Brothers of the Blessed Virgin Mary of Mount Carmel () or the Order of Discalced Carmelites (; abbreviation, abbrev.: OCD; sometimes called in earlier times, ), is a Catho ...
, an offshoot of the
Carmelite Order
The Order of the Brothers of the Blessed Virgin Mary of Mount Carmel (; abbreviated OCarm), known as the Carmelites or sometimes by synecdoche known simply as Carmel, is a mendicant order in the Catholic Church for both men and women. Histo ...
, as a distinct unit or "province" within the former by the decree "Pia consideratione" dated 22 June 1580, ending a period of great difficulty between them and enabling the former to become a significant religious order in the Catholic Church.
Formation of clergy and promotion of the arts and sciences
Gregory XIII was a generous patron of the
Jesuit
The Society of Jesus (; abbreviation: S.J. or SJ), also known as the Jesuit Order or the Jesuits ( ; ), is a religious order (Catholic), religious order of clerics regular of pontifical right for men in the Catholic Church headquartered in Rom ...
colleges in Rome. The Roman College of the Jesuits grew substantially under his patronage, and became the most important centre of learning in Europe for a time. It is now named the
Pontifical Gregorian University
Pontifical Gregorian University (; also known as the Gregorian or Gregoriana), is a private university, private pontifical university in Rome, Italy.
The Gregorian originated as a part of the Roman College, founded in 1551 by Ignatius of Loyo ...
. Pope Gregory XIII also founded numerous
seminaries
A seminary, school of theology, theological college, or divinity school is an educational institution for educating students (sometimes called seminarians) in scripture and theology, generally to prepare them for ordination to serve as clerg ...
for training priests, beginning with the
German College
The ''Collegium Germanicum et Hungaricum'', or simply ''Collegium Germanicum'', is a German-speaking seminary for Catholic priests in Rome, founded in 1552. Since 1580 its full name has been ''Pontificium Collegium Germanicum et Hungaricum de Urb' ...
at
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, ...
, and put them in the charge of the Jesuits.
In 1575, he gave official status to the
Congregation of the Oratory, a community of priests without vows, dedicated to prayer and preaching (founded by Saint
Philip Neri
Saint Philip Neri , born Filippo Romolo Neri, (22 July 151526 May 1595) was an Italian Catholic priest who founded the Congregation of the Oratory, a society of secular clergy dedicated to pastoral care and charitable work. He is sometimes refe ...
). In 1580 he commissioned artists, including
Ignazio Danti, to complete works to decorate the
Vatican
Vatican may refer to:
Geography
* Vatican City, an independent city-state surrounded by Rome, Italy
* Vatican Hill, in Rome, namesake of Vatican City
* Ager Vaticanus, an alluvial plain in Rome
* Vatican, an unincorporated community in the ...
and commissioned
The Gallery of Maps.
Gregory also transformed the Dominican studium founded in the 13th century at Rome into the College of St. Thomas in 1580, as recommended by the Council of Trent. This college was the precursor of the
Pontifical University of Saint Thomas Aquinas
The Pontifical University of Saint Thomas Aquinas (PUST), also known as the ''Angelicum'' or ''Collegio Angelico'' (in honor of its patron, the ''Doctor Angelicus'' Thomas Aquinas), is a pontifical university located in the historic center of R ...
''Angelicum''.
The Gregorian calendar
Pope Gregory XIII is best known for commissioning the
Gregorian calendar
The Gregorian calendar is the calendar used in most parts of the world. It went into effect in October 1582 following the papal bull issued by Pope Gregory XIII, which introduced it as a modification of, and replacement for, the Julian cale ...
, initially authored by the physician/astronomer
Aloysius Lilius
Aloysius Lilius ( 1510 – 1576), also variously referred to as Luigi Lilio or Luigi Giglio, was an Italian physician, astronomer, philosopher and chronologist, and also the "primary author" who provided the proposal that (after modifications) ...
and aided by Jesuit priest/astronomer
Christopher Clavius
Christopher Clavius, (25 March 1538 – 6 February 1612) was a Jesuit German mathematician, head of mathematicians at the , and astronomer who was a member of the Vatican commission that accepted the proposed calendar invented by Aloysius ...
, who made the final modifications. This calendar is more accurate than the
Julian calendar
The Julian calendar is a solar calendar of 365 days in every year with an additional leap day every fourth year (without exception). The Julian calendar is still used as a religious calendar in parts of the Eastern Orthodox Church and in parts ...
, which treats each year as 365 days and 6 hours in length, even though the actual length of a year is slightly less (365 days, 5 hours, and 49 minutes). As a result, the date of the
vernal equinox had slowly, over the course of 13 centuries, slipped to 10 March, while the
computus
As a moveable feast, the date of Easter is determined in each year through a calculation known as – often simply ''Computus'' – or as paschalion particularly in the Eastern Orthodox Church. Easter is celebrated on the first Sunday after th ...
(calculation) of the date of Easter still followed the traditional date of 21 March. Clavius verified this phenomenon.
Gregory subsequently decreed, by the
papal bull
A papal bull is a type of public decree, letters patent, or charter issued by the pope of the Catholic Church. It is named after the leaden Seal (emblem), seal (''bulla (seal), bulla'') traditionally appended to authenticate it.
History
Papal ...
''
Inter gravissimas'' of 24 February 1582, that the day after Thursday, 4 October 1582 would be the fifteenth, not the fifth, of October. The new calendar replaced the Julian calendar, which had been used since 45 BC. Because of Gregory's involvement, the new calendar came to be known as the Gregorian calendar and has been almost universally adopted.
Much of the populace bitterly opposed this reform; they feared it was an attempt by landlords to cheat them out of a week and a half's rent. However, the Catholic countries of
Spain
Spain, or the Kingdom of Spain, is a country in Southern Europe, Southern and Western Europe with territories in North Africa. Featuring the Punta de Tarifa, southernmost point of continental Europe, it is the largest country in Southern Eur ...
,
Portugal
Portugal, officially the Portuguese Republic, is a country on the Iberian Peninsula in Southwestern Europe. Featuring Cabo da Roca, the westernmost point in continental Europe, Portugal borders Spain to its north and east, with which it share ...
,
Poland-Lithuania, and the Italian states complied.
France
France, officially the French Republic, is a country located primarily in Western Europe. Overseas France, Its overseas regions and territories include French Guiana in South America, Saint Pierre and Miquelon in the Atlantic Ocean#North Atlan ...
, some states of the
Dutch Republic
The United Provinces of the Netherlands, commonly referred to in historiography as the Dutch Republic, was a confederation that existed from 1579 until the Batavian Revolution in 1795. It was a predecessor state of the present-day Netherlands ...
and various Catholic states in the
Holy Roman Empire
The Holy Roman Empire, also known as the Holy Roman Empire of the German Nation after 1512, was a polity in Central and Western Europe, usually headed by the Holy Roman Emperor. It developed in the Early Middle Ages, and lasted for a millennium ...
and
Switzerland
Switzerland, officially the Swiss Confederation, is a landlocked country located in west-central Europe. It is bordered by Italy to the south, France to the west, Germany to the north, and Austria and Liechtenstein to the east. Switzerland ...
(both countries were religiously split) followed suit within a year or two.
Austria
Austria, formally the Republic of Austria, is a landlocked country in Central Europe, lying in the Eastern Alps. It is a federation of nine Federal states of Austria, states, of which the capital Vienna is the List of largest cities in Aust ...
and
Hungary
Hungary is a landlocked country in Central Europe. Spanning much of the Pannonian Basin, Carpathian Basin, it is bordered by Slovakia to the north, Ukraine to the northeast, Romania to the east and southeast, Serbia to the south, Croatia and ...
followed in 1587.
However, more than a century passed before
Protestant
Protestantism is a branch of Christianity that emphasizes Justification (theology), justification of sinners Sola fide, through faith alone, the teaching that Salvation in Christianity, salvation comes by unmerited Grace in Christianity, divin ...
Europe accepted the new calendar.
Denmark-Norway, the remaining states of the Dutch Republic, and the Protestant states of the Holy Roman Empire and Switzerland adopted the Gregorian reform in 1700–01. By that time, the calendar trailed the seasons by 11 days.
Great Britain
Great Britain is an island in the North Atlantic Ocean off the north-west coast of continental Europe, consisting of the countries England, Scotland, and Wales. With an area of , it is the largest of the British Isles, the List of European ...
, its
American colonies and
Ireland
Ireland (, ; ; Ulster Scots dialect, Ulster-Scots: ) is an island in the North Atlantic Ocean, in Northwestern Europe. Geopolitically, the island is divided between the Republic of Ireland (officially Names of the Irish state, named Irelan ...
adopted the reformed calendar in 1752, where Wednesday 2 September 1752 was immediately followed by Thursday 14 September 1752; they were joined by the last Protestant holdout,
Sweden
Sweden, formally the Kingdom of Sweden, is a Nordic countries, Nordic country located on the Scandinavian Peninsula in Northern Europe. It borders Norway to the west and north, and Finland to the east. At , Sweden is the largest Nordic count ...
, on 1 March 1753.
The Gregorian calendar was not accepted in
eastern Christendom for several hundred years, and then only as the civil calendar.
Foreign policy
Though he feared the invasion of Europe by the
Turks, Gregory XIII's attentions were more consistently directed to the dangers of the
Protestants
Protestantism is a branch of Christianity that emphasizes Justification (theology), justification of sinners Sola fide, through faith alone, the teaching that Salvation in Christianity, salvation comes by unmerited Grace in Christianity, divin ...
. He encouraged the plans of Philip II to dethrone
Elizabeth I of England
Elizabeth I (7 September 153324 March 1603) was Queen of England and Ireland from 17 November 1558 until her death in 1603. She was the last and longest reigning monarch of the House of Tudor. Her eventful reign, and its effect on history ...
(reigned from 1558 to 1603), resulting in English Protestants suspecting
Catholics
The Catholic Church (), also known as the Roman Catholic Church, is the largest Christian church, with 1.27 to 1.41 billion baptized Catholics worldwide as of 2025. It is among the world's oldest and largest international institut ...
as potential traitors and subversives.
In 1578, to further the plans of exiled English and Irish Catholics such as
Nicholas Sanders,
William Allen, and
James Fitzmaurice FitzGerald, Gregory outfitted adventurer
Thomas Stukeley with a ship and an army of 800 men to land in
Ireland
Ireland (, ; ; Ulster Scots dialect, Ulster-Scots: ) is an island in the North Atlantic Ocean, in Northwestern Europe. Geopolitically, the island is divided between the Republic of Ireland (officially Names of the Irish state, named Irelan ...
to aid the Catholics against the Protestant plantations. To his dismay, Stukeley joined his forces with those of King
Sebastian of Portugal
Sebastian ( ; 20 January 1554 – 4 August 1578) was King of Portugal from 11 June 1557 to 4 August 1578 and the penultimate Portuguese monarch of the House of Aviz.
He was the son of João Manuel, Prince of Portugal, and his wife, Joanna of Aus ...
against Sultan
Abdul Malik of Morocco instead.
Another papal expedition sailed to Ireland in 1579 with a mere 50 soldiers under the command of Fitzmaurice, accompanied by Sanders as
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 ...
. They took part in the
Second Desmond Rebellion
The Second Desmond Rebellion (1579–1583) was the more widespread and bloody of the two Desmond Rebellions in Ireland launched by the FitzGerald Dynasty of County Desmond, Desmond in Munster against English rule. The second rebellion began in ...
. All of the soldiers and sailors on board, as well as the women and children who accompanied them, were beheaded or hanged on landing in Kerry in the
Smerwick Massacre.
In 1580, he was persuaded by English
Jesuits
The Society of Jesus (; abbreviation: S.J. or SJ), also known as the Jesuit Order or the Jesuits ( ; ), is a religious order (Catholic), religious order of clerics regular of pontifical right for men in the Catholic Church headquartered in Rom ...
to moderate or suspend the Bull ''
Regnans in Excelsis'' (1570), which had excommunicated Queen Elizabeth I of England. Catholics were advised to obey the queen outwardly in all civil matters until such time as a suitable opportunity presented itself for her overthrow.

After the
St. Bartholomew's Day Massacres of
Huguenot
The Huguenots ( , ; ) are a Religious denomination, religious group of French people, French Protestants who held to the Reformed (Calvinist) tradition of Protestantism. The term, which may be derived from the name of a Swiss political leader, ...
s in France in 1572, Pope Gregory signaled his approval and celebrated a ''
Te Deum
The ( or , ; from its incipit, ) is a Latin Christian hymn traditionally ascribed to a date before AD 500, but perhaps with antecedents that place it much earlier. It is central to the Ambrosian hymnal, which spread throughout the Latin ...
'' mass. Three frescoes in the
Sala Regia hall of the Vatican depicting the events were commissioned and painted by
Giorgio Vasari
Giorgio Vasari (30 July 1511 – 27 June 1574) was an Italian Renaissance painter, architect, art historian, and biographer who is best known for his work ''Lives of the Most Excellent Painters, Sculptors, and Architects'', considered the ideol ...
. A commemorative medal was issued with Gregory's portrait and on the obverse a chastising angel, sword in hand and the legend
UGONOTTORUM STRAGES ("Overthrow of the Huguenots").
Gregory XIII was visited by the
Tenshō embassy of Japan, becoming the first Pope to have received such an embassy. On behalf of the Japanese ruler
Oda Nobunaga
was a Japanese ''daimyō'' and one of the leading figures of the Sengoku period, Sengoku and Azuchi-Momoyama periods. He was the and regarded as the first "Great Unifier" of Japan. He is sometimes referred as the "Demon Daimyō" and "Demo ...
, they gifted him with the so-called
Azuchi Screens, which were put on display within the Vatican.
Cultural patronage
In Rome, Gregory XIII built the Gregorian chapel in the
Basilica of St. Peter and extended the
Quirinal Palace
The Quirinal Palace ( ) is a historic building in Rome, Italy, the main official residence of the President of Italy, President of the Italian Republic, together with Villa Rosebery in Naples and the Tenuta di Castelporziano, an estate on the outs ...
in 1580. He also turned the
Baths of Diocletian
The Baths of Diocletian (Latin: ''Thermae Diocletiani'', Italian: ''Terme di Diocleziano'') were public baths in ancient Rome. Named after emperor Diocletian and built from AD 298 to 306, they were the largest of the imperial baths. The project w ...
into a granary in 1575.
He appointed his illegitimate son
Giacomo, born to his mistress at
Bologna
Bologna ( , , ; ; ) is the capital and largest city of the Emilia-Romagna region in northern Italy. It is the List of cities in Italy, seventh most populous city in Italy, with about 400,000 inhabitants and 150 different nationalities. Its M ...
before his papacy,
castellan
A castellan, or constable, was the governor of a castle in medieval Europe. Its surrounding territory was referred to as the castellany. The word stems from . A castellan was almost always male, but could occasionally be female, as when, in 1 ...
of
Sant'Angelo and
Gonfalonier of the Church;
Venice
Venice ( ; ; , formerly ) is a city in northeastern Italy and the capital of the Veneto Regions of Italy, region. It is built on a group of 118 islands that are separated by expanses of open water and by canals; portions of the city are li ...
, anxious to please the Pope, enrolled his son among its nobles, and Philip II of Spain appointed him general in his army. Gregory also helped his son to become a powerful feudatory through the acquisition of the
Duchy of Sora
The Duchy of Sora was a Historical states of Italy, semi-independent state in Italy, created in 1443 by King Alfonso V of Aragon, Alfonso I of Naples and dissolved in 1796. It occupied the south-eastern part of what is today Lazio, bordering what i ...
, on the border between the
Papal States
The Papal States ( ; ; ), officially the State of the Church, were a conglomeration of territories on the Italian peninsula under the direct sovereign rule of the pope from 756 to 1870. They were among the major states of Italy from the 8th c ...
and the
Kingdom of Naples
The Kingdom of Naples (; ; ), officially the Kingdom of Sicily, was a state that ruled the part of the Italian Peninsula south of the Papal States between 1282 and 1816. It was established by the War of the Sicilian Vespers (1282–1302). Until ...
.
To raise funds for his endeavours, Gregory confiscated a large proportion of the houses and properties throughout the states of the Church. This measure enriched his treasury for a time, but alienated a great body of the nobility and gentry, revived old factions, and created new ones, and caused economic and social chaos in the Papal States.
Canonizations and beatifications
The pope canonized four saints during his pontificate and in 1584 beatified his predecessor
Pope Gregory VII
Pope Gregory VII (; 1015 – 25 May 1085), born Hildebrand of Sovana (), was head of the Catholic Church and ruler of the Papal States from 22 April 1073 to his death in 1085. He is venerated as a saint in the Catholic Church.
One of the great ...
.
Consistories

During his pontificate, the pope created 34 cardinals in eight consistories; this included naming his nephew
Filippo Boncompagni to the cardinalate in the pope's first consistory in 1572. Gregory XIII also named four of his successors as cardinals all in 1583:
Giovanni Battista Castagna (Urban VII),
Niccolò Sfondrati
Pope Gregory XIV (; ; 11 February 1535 – 16 October 1591), born Niccolò Sfondrato or Sfondrati, was head of the Catholic Church and ruler of the Papal States from 5 December 1590 to his death, in October 1591.
Early career
Niccolò S ...
(Gregory XIV),
Giovanni Antonio Facchinetti (Innocent IX), and
Alessandro de' Medici (Leo XI).
Death
The pope suffered from a fever on 5 April 1585 and on 7 April said his usual private Mass, still in ill health. He seemed to recover enough that he was able to conduct meetings throughout 8 and 9 April, although it was observed he did not feel well. But a sudden change on 10 April saw him confined in his bed and it was observed that he had a cold sweat and a weak pulse; he received
Extreme Unction
In the Catholic Church, the anointing of the sick, also known as Extreme Unction, is a Catholic sacrament that is administered to a Catholic "who, having reached the age of reason, begins to be in danger due to sickness or old age", except in ...
moments before he died.
See also
*
Computus
As a moveable feast, the date of Easter is determined in each year through a calculation known as – often simply ''Computus'' – or as paschalion particularly in the Eastern Orthodox Church. Easter is celebrated on the first Sunday after th ...
*
Clavius
*
Cardinals created by Gregory XIII
Explanatory notes
References
Citations
Sources
* ''Initial text from the 9th edition (1880) of an unnamed encyclopedia.''
*
*
*
External links
"Papal Library" website:Gregory XIII
rchived
{{DEFAULTSORT:Gregory 13
1502 births
1585 deaths
House of Boncompagni
Clergy from Bologna
Italian popes
Popes
16th-century popes
People of the Second Desmond Rebellion
Burials at St. Peter's Basilica