All Topics  
Pope Gregory XIII

 
Pope Gregory XIII

   Email Print
   Bookmark   Link






 

Pope Gregory XIII



 
 
Pope Gregory XIII (January 7, 1502 – April 10, 1585), born Ugo Boncompagni, was Pope
Pope

The Pope is the Bishop of Rome, the leader of the Roman Catholic Church and head of state of Vatican City. The current pope is Pope Benedict XVI, who was elected April 19, 2005 in Papal conclave, 2005....
 from 1572 to 1585.

as born in the city of Bologna
Bologna

Bologna is the capital city of Emilia-Romagna in northern Italy, in the Po Valley , between the Po River and the Apennine Mountains, exactly between the Reno River and the S?vena River....
, where he studied law and graduated in 1530. Afterwards, he taught jurisprudence for some years; his students included notable figures such as Alexander Farnese, Reginald Pole and Charles Borromeo
Charles Borromeo

Saint Charles Borromeo is an Italy saint and was a Cardinal of the Roman Catholic Church. He worked during the period of the Counter-Reformation and was responsible for significant reforms in the Catholic Church, including the founding of seminaries for the education of priests....
.

he age of thirty-six he was summoned to Rome by Pope Paul III
Pope Paul III

Pope Paul III , born Alessandro Farnese, was Pope of the Roman Catholic Church from 1534 to his death in 1549. He also called the Council of Trent in 1545....
 (1534–1549), under whom he held successive appointments as first judge of the capital, abbreviator
Abbreviator

Abbreviator, plural Abbreviators in English or Abbreviatores in Latin, also called Breviators, were a body of writers in the papal Apostolic Chancery, whose business was to sketch out and prepare in due form the papal bull, Papal brief and consistory decrees before these are written out in extenso by the scriptores....
, and vice-chancellor of the Campagna
Campagna

Campagna is a small town and comune of the province of Salerno, in the Campania region of Southern Italy.The town, located in a mountainous district, gradually lost importance in the 20th century....
; by Pope Paul IV
Pope Paul IV

Pope Paul IV , n? Giovanni Pietro Carafa, was Pope from May 23, 1555 until his death.Giovanni Pietro Carafa was born in Capriglia Irpina, near Avellino, into a prominent noble family of Naples....
 (1555–1559) he was attached as datarius to the suite of Cardinal Carafa
Carlo Carafa

Carlo Cardinal Carafa was born at Naples on March 29, 1517 into one of the city's most ancient and distinguished families. His father was Giovanni Alfonso Carafa, count of Montorio, and his mother Caterina Cantelma....
; and by Pope Pius IV
Pope Pius IV

Pope Pius IV , born Giovanni Angelo Medici, was Pope from 1559 to 1565. He is notable for presiding over the culmination of the Council of Trent....
 (1559–1565) he was created cardinal priest and sent to the council of Trent
Council of Trent

The Council of Trent was the 16th century Ecumenical Council of the Roman Catholic Church. Considered one of the Church's most important councils, it convened in Trento between December 13, 1545, and December 4, 1563 in twenty-five sessions for three periods....
.

He also served as a legate to Philip II of Spain
Philip II of Spain

Philip II was King of Spain from 1556 until 1598, List of monarchs of Naples from 1554 until 1598, king consort of England, as husband of Mary I of England, from 1554 to 1558, lord of the Seventeen Provinces from 1556 until 1581, holding various titles for the individual territories, such as Duke or Count; and King of Portugal as Philip I...
 (1556–1598), being sent by the Pope to investigate the Cardinal of Toledo
Toledo, Spain

Toledo is a city and municipality located in central Spain, 70 km south of Madrid. It is the capital city of the province of Toledo and of the autonomous communities of Spain of Castile-La Mancha....
.






Discussion
Ask a question about 'Pope Gregory XIII'
Start a new discussion about 'Pope Gregory XIII'
Answer questions from other users
Full Discussion Forum



Encyclopedia


Pope Gregory XIII (January 7, 1502 – April 10, 1585), born Ugo Boncompagni, was Pope
Pope

The Pope is the Bishop of Rome, the leader of the Roman Catholic Church and head of state of Vatican City. The current pope is Pope Benedict XVI, who was elected April 19, 2005 in Papal conclave, 2005....
 from 1572 to 1585.

Early biography


Youth

He was born in the city of Bologna
Bologna

Bologna is the capital city of Emilia-Romagna in northern Italy, in the Po Valley , between the Po River and the Apennine Mountains, exactly between the Reno River and the S?vena River....
, where he studied law and graduated in 1530. Afterwards, he taught jurisprudence for some years; his students included notable figures such as Alexander Farnese, Reginald Pole and Charles Borromeo
Charles Borromeo

Saint Charles Borromeo is an Italy saint and was a Cardinal of the Roman Catholic Church. He worked during the period of the Counter-Reformation and was responsible for significant reforms in the Catholic Church, including the founding of seminaries for the education of priests....
.

Career before Papacy

At the age of thirty-six he was summoned to Rome by Pope Paul III
Pope Paul III

Pope Paul III , born Alessandro Farnese, was Pope of the Roman Catholic Church from 1534 to his death in 1549. He also called the Council of Trent in 1545....
 (1534–1549), under whom he held successive appointments as first judge of the capital, abbreviator
Abbreviator

Abbreviator, plural Abbreviators in English or Abbreviatores in Latin, also called Breviators, were a body of writers in the papal Apostolic Chancery, whose business was to sketch out and prepare in due form the papal bull, Papal brief and consistory decrees before these are written out in extenso by the scriptores....
, and vice-chancellor of the Campagna
Campagna

Campagna is a small town and comune of the province of Salerno, in the Campania region of Southern Italy.The town, located in a mountainous district, gradually lost importance in the 20th century....
; by Pope Paul IV
Pope Paul IV

Pope Paul IV , n? Giovanni Pietro Carafa, was Pope from May 23, 1555 until his death.Giovanni Pietro Carafa was born in Capriglia Irpina, near Avellino, into a prominent noble family of Naples....
 (1555–1559) he was attached as datarius to the suite of Cardinal Carafa
Carlo Carafa

Carlo Cardinal Carafa was born at Naples on March 29, 1517 into one of the city's most ancient and distinguished families. His father was Giovanni Alfonso Carafa, count of Montorio, and his mother Caterina Cantelma....
; and by Pope Pius IV
Pope Pius IV

Pope Pius IV , born Giovanni Angelo Medici, was Pope from 1559 to 1565. He is notable for presiding over the culmination of the Council of Trent....
 (1559–1565) he was created cardinal priest and sent to the council of Trent
Council of Trent

The Council of Trent was the 16th century Ecumenical Council of the Roman Catholic Church. Considered one of the Church's most important councils, it convened in Trento between December 13, 1545, and December 4, 1563 in twenty-five sessions for three periods....
.

He also served as a legate to Philip II of Spain
Philip II of Spain

Philip II was King of Spain from 1556 until 1598, List of monarchs of Naples from 1554 until 1598, king consort of England, as husband of Mary I of England, from 1554 to 1558, lord of the Seventeen Provinces from 1556 until 1581, holding various titles for the individual territories, such as Duke or Count; and King of Portugal as Philip I...
 (1556–1598), being sent by the Pope to investigate the Cardinal of Toledo
Toledo, Spain

Toledo is a city and municipality located in central Spain, 70 km south of Madrid. It is the capital city of the province of Toledo and of the autonomous communities of Spain of Castile-La Mancha....
. It was here that he formed a lasting and close relationship with the Spanish King, which was to become a very important during his foreign policy as Pope.

Election as Pope

Upon the death of Pope Pius V (1566–1572), the conclave
Papal conclave, 1572

The Papal conclave, May 12 ? May 13, 1572 ? papal conclave convoked after the death of Pius V, elected Cardinal Ugo Boncompagni, who under the name of Gregory XIII became the 226th pope of the Catholic Church....
 chose Cardinal Boncompagni, who assumed the name of Gregory XIII, in homage to the great reforming Pope, Gregory I
Pope Gregory I

Pope Saint Gregory I or Gregory the Great was pope from 3 September 590 until his death.He is also known as Gregory the Dialogist in Eastern Orthodoxy because of his Dialogues....
 (590–604), surnamed the Great. It was a very brief conclave, lasting less than 24 hours, presumed by many historians to have been due to the influence and backing of the Spanish King. His character seemed to be perfect for the needs of the church at the time. Unlike some of his predecessors, Gregory XIII was to lead a faultless personal life, becoming a model for his simplicity of life. Additionally, his legal brilliance and management abilities meant that he was able to respond and deal with the major problems quickly and decisively, although not always successfully.

Pontificate


Reform of the Church

Once in the chair of Saint Peter
Saint Peter

Saint Peter was a leader of the early Christianity church, who features prominently in the New Testament Gospels and the Acts of the Apostles....
, Gregory XIII's rather worldly concerns became secondary and he dedicated himself to reform of the Catholic Church. He committed himself to putting into practice the recommendations of the Council of Trent
Council of Trent

The Council of Trent was the 16th century Ecumenical Council of the Roman Catholic Church. Considered one of the Church's most important councils, it convened in Trento between December 13, 1545, and December 4, 1563 in twenty-five sessions for three periods....
. He allowed no exceptions for cardinals to the rule that bishops must take up residence in their see
See

The word "see" may refer to:* The act of visual perception* The term "See:" as a form of citation signal* Episcopal see, domain of authority of a bishop...
s, and designated a committee to update the Index of Forbidden Books. A new and greatly improved edition of the Corpus juris canonici was also due to his concerned patronage. In a time of considerable centralisation 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 having a fierce independence; with the few confidants noting there were interventions that were not always welcomed nor advice sought for. The power of the papacy increased under him, whereas the influence and power of the cardinals substantially decreased.

Formation of clergy and promotion of the arts and sciences

A central part of the strategy of Gregory XIII's reform was to apply the recommendations of Trent. He was a liberal patron of the recently formed Society of Jesus
Society of Jesus

The Society of Jesus is a Roman Catholic religious order of clerks regular whose members are called Jesuits, Soldiers of Jesus Christ, and Foot soldiers of the Pope, because the founder, Saint Ignatius of Loyola, was a knight before becoming a Holy Orders....
 throughout Europe
Europe

Europe is, conventionally, one of the world's seven continents. Comprising the westernmost peninsula of Eurasia, Europe is generally divided from Asia to its east by the water divide of the Ural Mountains, the Ural , the Caspian Sea, and by the Caucasus Mountains to the southeast....
, for which he founded many new colleges. The Roman College, of the Jesuits, grew substantially under his patronage, and became the most important centre of learning in Europe for a time, a University of the Nations. It is now named the Pontifical Gregorian University
Pontifical Gregorian University

Pontifical Gregorian University is a pontifical university located in Rome, Italy. Heir of the Roman College founded by St Ignatius of Loyola over 450 years ago, the Gregorian University was the first Jesuit University....
. Pope Gregory XIII also founded numerous seminaries for training priests, beginning with the German College at Rome
Rome

Rome is the capital city of Italy and Lazio, and is Italy's largest and most populous city, with 2,724,347 residents in an urban area of some ....
, and put them in the charge of the Jesuits
Society of Jesus

The Society of Jesus is a Roman Catholic religious order of clerks regular whose members are called Jesuits, Soldiers of Jesus Christ, and Foot soldiers of the Pope, because the founder, Saint Ignatius of Loyola, was a knight before becoming a Holy Orders....
.

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 Filippo Neri).

The Gregorian Calendar

Gregorianscher Kalender Petersdom
Gregory XIII is best known for his reformation of the calendar, producing the Gregorian calendar
Gregorian calendar

The Gregorian calendar is the internationally accepted civil calendar. It was first proposed by the Calabrian doctor Aloysius Lilius, and decreed by Pope Gregory XIII, after whom it was named, on 24 February 1582 by the papal bull Inter gravissimas....
 with the aid of Jesuit priest/astronomer Christopher Clavius
Christopher Clavius

Christopher Clavius, was a Germany Jesuit mathematician and astronomer who was the main architect of the modern Gregorian calendar. In his last years he was probably the most respected astronomer in Europe and his textbooks were used for astronomical education for over fifty years in Europe and even in more remote lands ....
. The reason for the reform is that the average length of the year in the Julian Calendar
Julian calendar

The Julian calendar, a reform of the Roman calendar, was introduced by Julius Caesar in 46 BC, and came into force in 45 BC . It was chosen after consultation with the astronomer Sosigenes of Alexandria and was probably designed to approximate the tropical year, known at least since Hipparchus....
 was too long, and the date of the actual Vernal Equinox had slowly slipped to March 10, whereas the computus
Computus

Computus is the calculation of the date of Easter in the Christian calendar. The name has been used for this procedure since the early Middle Ages, as it was one of the most important computations of the age....
 (calculation) of the Easter date of Easter still followed the traditional date of March 21.

This was rectified by following the observations of Clavius and Johannes Kepler
Johannes Kepler

Johannes Kepler was a Germans mathematician, astronomer and astrologer, and key figure in the 17th century Scientific revolution. He is best known for his eponymous Kepler's laws of planetary motion, codified by later astronomers based on his works Astronomia nova, Harmonices Mundi, and Epitome of Copernican Astrononomy....
, and the calendar was changed when Gregory decreed that the day after Thursday, October 4, 1582 would be not Friday, October 5, but Friday, October 15, 1582. He issued the papal bull
Papal bull

A Papal bull is a particular type of letters patent or charter issued by a pope. It is named after the bulla that was appended to the end to authenticate it....
 Inter gravissimas
Inter gravissimas

Inter gravissimas was a papal bull issued by Pope Gregory XIII on February 24, 1582. The document reformed the Julian calendar and created a new calendar which came to be called the Gregorian calendar, which is used in most countries today....
 to promulgate the new calendar on February 24, 1582. On October 15, 1582, this calendar replaced the Julian calendar
Julian calendar

The Julian calendar, a reform of the Roman calendar, was introduced by Julius Caesar in 46 BC, and came into force in 45 BC . It was chosen after consultation with the astronomer Sosigenes of Alexandria and was probably designed to approximate the tropical year, known at least since Hipparchus....
, in use since 45 BC, and has become universally used today. Because of his decree, the reform of the Julian calendar came to be known as the Gregorian calendar.

The switchover was bitterly opposed by much of the populace, who 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, Portugal, Poland, and Italy complied. France, some states of the Dutch Republic
Dutch Republic

The Republic of the Seven United Netherlands was a European republic between 1581 and 1795, in about the same location as the modern Kingdom of the Netherlands, which is the successor state....
 and various Catholic states in Germany and Switzerland (both countries were religiously split) followed suit within a year or two, and Hungary followed in 1587.

However, more than a century would pass before Protestant Europe would accept the new calendar. Denmark, the remaining states of the Dutch Republic, and the Protestant states of the Holy Roman Empire
Holy Roman Empire

The Holy Roman Empire was a union of territories in Central Europe during the Middle Ages and the Early modern Europe under a Holy Roman Emperor....
 and Switzerland adopted the Gregorian reform in 1700-1701. By this time, the calendar trailed the seasons by 11 days. Great Britain and its American colonies reformed in 1752, where Wednesday, September 2, 1752 was immediately followed by Thursday, September 14, 1752; they were joined by the last Protestant holdout, Sweden, on March 1, 1753.

The Gregorian Calendar was not accepted in eastern Christendom for several hundred years, and then only as the civil calendar. The Gregorian Calendar was instituted in Russia
Russia

Russia , or the Russian Federation , is a list of countries spanning more than one continent country extending over much of northern Eurasia....
 by the Bolshevik
Bolshevik

Bolsheviks, originally also Bolshevists were a faction of the Marxism Russian Social Democratic Labour Party which split apart from the Menshevik faction at the 2nd Congress of the RSDLP in 1903 and ultimately became the Communist Party of the Soviet Union....
s in 1917, and the last Eastern Orthodox country to accept the calendar was Greece
Greece

Greece , officially the Hellenic Republic , is a country in southeastern Europe, situated on the southern end of the Balkans. It has borders with Albania, Bulgaria and the former Yugoslav Republic of Macedonia to the north, and Turkey to the east....
 in 1923.

While some Eastern Orthodox national churches have accepted the Gregorian Calendar dates for feast days that occur on the same date every year, the dates of all movable feasts (such as Easter
Easter

Easter is the most important religious feast in the Christianity liturgical year.Christians believe that Jesus was Resurrection of Jesus from the dead three days after his Crucifixion of Jesus, and celebrate this resurrection on Easter Day or Easter Sunday , two days after Good Friday....
) are still calculated in the Eastern Orthodox churches by reference to the Julian calendar.

Foreign policy

Though he expressed the conventional fears of the danger from the Turks
Ottoman Empire

The Ottoman Empire , also known by its contemporaries as the Turkish Empire or Turkey , was an empire that lasted from 1299?1923. It was Treaty of Lausanne by the Republic of Turkey, which was officially proclaimed on October 29, 1923....
, Gregory XIII's attentions were more consistently directed to the dangers from the Protestants.

He encouraged the plans of Phillip II to dethrone Elizabeth I of England
Elizabeth I of England

Elizabeth I was List of English monarchs and Queen of Ireland from 17 November 1558 until her death. Sometimes called The Virgin Queen, Gloriana, or Good Queen Bess, Elizabeth was the fifth and last monarch of the House of Tudor....
 (1558–1603) thus succeeded in developing an atmosphere of subversion and imminent danger among English Protestants, who looked on any Roman Catholic as a potential traitor.

In 1578, to further the plans of exiled English and Irish catholics such as Nicholas Sanders
Nicholas Sanders

Nicholas Sanders was an England Roman Catholic priest and historian....
, William Cardinal Allen
William Cardinal Allen

}} | Reason for exit   }}|- style="vertical-align: top;"|- style="vertical-align: middle;;"||Previous post | canon of the Cathedral Chapter at Rheims...
 and James Fitzmaurice Fitzgerald
James FitzMaurice FitzGerald

James Fitzmaurice Fitzgerald, a member of the 16th century ruling FitzGerald dynasty in the province of Munster in Ireland, rebelled against the crown authority of Queen Elizabeth I of England in response to the onset of the Tudor re-conquest of Ireland and was deemed an archtraitor....
, Gregory outfitted adventurer Thomas Stukeley with a ship and an army of 800 men to land in Ireland
Ireland

Ireland is the List of islands by area in Europe, and the twentieth-largest island in the world. It lies to the north-west of continental Europe and is surrounded by hundreds of islands and islet....
 to aid in the hoped for overthrow of Elizabeth's rule through the Catholic leader and former leader of the first Desmond rebellion, Fitzmaurice. To his dismay Stukeley joined his forces with those of King Sebastian of Portugal
Sebastian of Portugal

Sebastian I, King of Portugal "the Desired" was the 16th Kings of Portugal. He was the son of Prince John, Crown Prince of Portugal and his wife, Joan of Spain....
 against Emperor Abdul Malik of Morocco
Abu Marwan Abd al-Malik I Saadi

Abu Marwan Abd al-Malik I was the Sultan of the Saadi Dynasty from 1576 until his death at the Battle of Alcazarquivir against Portugal in 1578....
 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
Papal legate

A Papal Legate ? from the Latin, authentic Roman title Legatus ? is a personal representative of the Pope to Foreign nations, or to some part of the Catholic Church....
. The resulting Second Desmond Rebellion
Second Desmond Rebellion

The Second Desmond rebellion was the more widespread and bloody of the two Desmond Rebellions launched by the Fitzgerald dynasty of County Desmond in Munster, southern Ireland, against English rule in Ireland....
 was equally unsuccessful. Gregory's greatest success came in his patronage of colleges and seminaries which he founded on the Continent for the Irish and English, among others. Pope Gregory XIII had no connection with the plot of Henry, Duke of Guise, and his brother, Charles, Duke of Mayenne, to assassinate Elizabeth I in 1582, and most probably knew nothing about it beforehand.

An embarrassing moment for the Papacy was the Massacre of Huguenot
Huguenot

The Huguenots were members of the Protestantism Reformed Church of France of France from the sixteenth to the eighteenth centuries....
s in France, although it is commonly held that the Pope was ignorant of the nature of the plot at the time, having been told the Huguenots had tried to take over the government but failed. He celebrated the St. Bartholomew's Day Massacre
St. Bartholomew's Day massacre

The St. Bartholomew's Day massacre in 1572 was a targeted group of assassinations, followed by a wave of Roman Catholic mob violence, both directed against the Huguenots , during the French Wars of Religion....
s in 1572 with a Te Deum, three frescoes depicting the events in the Sala Regia of the Vatican Palace commended to painter Giorgio Vasari
Giorgio Vasari

Giorgio Vasari was an Italy Painting and architect, who is today famous for his biography of Italian artists, considered the ideological foundation of art history writing....
 and a commemorative medal, with his portrait and on the obverse a chastising angel, sword in hand and the legend UGONOTTORUM STRAGES ("Slaughter of the Huguenots").

Cultural patronage

In Rome Gregory XIII built the magnificent Gregorian chapel in the Basilica of St. Peter, and extended the Quirinal Palace
Quirinal Palace

The Quirinal Palace is the official residence of the President of the Italian Republic on the Quirinal Hill, the tallest of the seven hills of Rome....
 in 1580. He also turned the Baths of Diocletian
Baths of Diocletian

The Baths of Diocletian in Ancient Rome were the grandest of the public baths, or thermae built by successive emperors. Diocletian's Baths, dedicated in 306, were the largest and most sumptuous of the imperial baths and remained in use until the aqueducts that fed them were cut by the Goths in 537....
 into a granary in 1575.

He appointed his illegitimate son Giacomo
Giacomo Boncompagni

Giacomo Boncompagni was an Italian powerful feudatory of the 16th century, the illegitimate son of Pope Gregory XIII . He was also Duke of Sora, Aquino, Arce and Arpino, and Marquess of Vignola....
, born to his mistress at Bologna
Bologna

Bologna is the capital city of Emilia-Romagna in northern Italy, in the Po Valley , between the Po River and the Apennine Mountains, exactly between the Reno River and the S?vena River....
 before his papacy, castellan of St. Angelo and gonfalonier
Gonfalone of the Church

The Gonfalone or Vessillo of the Holy Roman Church, or the Vessillo of Saint Peter, was the vexillum, banner or symbol of the Roman Catholic Church throughout the world, and particularly its battle-standard during the Renaissance....
 of the Church; Venice, anxious to please, enrolled him among its nobles. Philip II of Spain appointed him general in his army. Gregory also helped his son to become a powerful feudatary through the acquisition of the Duchy of Sora
Duchy of Sora

The Duchy of Sora was a sovereign state of Italy, created in 1443 by King Alfonso V of Aragon and dissolved in 1796. It occupied the south-eastern part of the current region of Lazio, bordering what is now Abruzzo, and its capital was the city of Sora, Italy....
, on the border between the Papal States
Papal States

The Papal States, State of the Church or Pontifical States were one of the major historical states of Italy from roughly the 6th century until the Italian peninsula was unified in 1861 by the Kingdom of Piedmont-Sardinia ....
 and te Kingdom of Naples
Kingdom of Naples

The Kingdom of Naples is the modern day name for a polity which existed on the southern part of the Italian peninsula. Also known contemporaneously, and somewhat confusingly, as the Kingdom of Sicily, this kingdom was founded after the secession of the island of Sicily from the old Kingdom of Sicily as a result of the Sicilian Vespers...
.

In order to raise funds for these and similar objects, he 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, created new ones, and ultimately plunged his temporal dominions into a state bordering upon anarchy. Such was the position of matters at the time of Gregory XIII's death, which took place on April 10, 1585.

Gregory XIII was succeeded by Pope Sixtus V
Pope Sixtus V

Pope Sixtus V , born Felice Peretti di Montalto, was Pope from 1585 to 1590....
 (1585–1590).

The oldest Papal tiara
Papal Tiara

The Papal Tiara, also known as the Triple Tiara, or in Latin language as the 'Triregnum', and in Italian language as the 'Triregno', is the three-tiered Gemstone papal Crown , supposedly of Byzantine Empire and Persian Empire origin, that is a prominent symbol of the Pope....
 still in existence dates from the reign of Gregory XIII.

See also

  • Computus
    Computus

    Computus is the calculation of the date of Easter in the Christian calendar. The name has been used for this procedure since the early Middle Ages, as it was one of the most important computations of the age....
  • Clavius


External links

  • Gregory XIII