Dom Peter, Duke of Coimbra,
KG ( ; 9 December 1392 – 20 May 1449) was a
Portuguese ''infante'' (prince) of the
House of Aviz
The House of Aviz (Portuguese language, Portuguese: ''Casa de Avis'' ), also known as the Joanine Dynasty (''Dinastia Joanina''), was a dynasty of Portuguese people, Portuguese origin which flourished during the Portuguese Renaissance, Renaissanc ...
, son of King Dom
John I of Portugal
John I ( WP:IPA for Portuguese, �uˈɐ̃w̃ 11 April 1357 – 14 August 1433), also called John of Aviz, was King of Portugal from 1385 until his death in 1433. He is recognized chiefly for his role in Portugal's victory in 1383–85 crisi ...
and his wife,
Philippa of Lancaster
Philippa of Lancaster ( ; 31 March 1360 – 19 July 1415) was Queen of Portugal from 1387 until 1415 as the wife of King John I. Born into the royal family of England, her marriage secured the Treaty of Windsor and produced several children ...
, daughter of
John of Gaunt
John of Gaunt, Duke of Lancaster (6 March 1340 – 3 February 1399), was an English royal prince, military leader and statesman. He was the fourth son (third surviving) of King Edward III of England, and the father of King Henry IV. Because ...
. In Portugal, he is known as Infante Dom Pedro das Sete Partidas
o Mundo "of the Seven Parts
f the World because of his travels. Possibly the best-travelled prince of his time, he was regent between 1439 and 1448. He was also 1st Lord of
Montemor-o-Velho
Montemor-o-Velho (), officially the Town of Montemor-o-Velho (), is a town and municipality of the Coimbra District, in Portugal. The population of the municipality in 2011 was 26,171, in an area of 228.96 km².
History
In 711, the Arab oc ...
,
Aveiro,
Tentúgal
Tentúgal is a parish of Montemor-o-Velho Municipality, Coimbra District, Portugal. The population in 2011 was 2,141, in an area of 34.29 km². The village is well known in Portugal for its old and unique conventual cakes, most notably the ' ...
, Cernache, Pereira,
Condeixa
Condeixa-a-Nova (), officially the Town of Condeixa-a-Nova (), and often called simply Condeixa, is a town and a municipality in the district of Coimbra, Portugal. The population in 2011 was 17,078, in an area of 138.67 km2. It is located 1 ...
and
Lousã
Lousã (), officially Lousã Town (), is a town and municipality in the district of Coimbra, in the central part of Portugal. The population in 2011 was 17,604, in an area of 138.40 km2.
History
The oldest evidence provides an indication of ...
.
Early life

From the time he was born, Peter was one of John I's favourite sons. Along with his siblings, he received an exceptional education rarely seen in those times for the children of royalty. Close to his brothers
Edward
Edward is an English male name. It is derived from the Anglo-Saxon name ''Ēadweard'', composed of the elements '' ēad'' "wealth, fortunate; prosperous" and '' weard'' "guardian, protector”.
History
The name Edward was very popular in Anglo-S ...
, the future king of Portugal, and
John, Lord of Reguengos de Monsaraz
Infante John, Constable of Portugal (, ; 13 January 1400 – 18 October 1442) was a Portuguese ''infante'' (prince) of the House of Aviz, Constable of Portugal and master of the Portuguese Order of St. James (Santiago). In Portugal, he is com ...
, Peter grew up in a calm environment free of intrigues.
On 14 August 1415, he accompanied his father and brothers Edward and
Henry
Henry may refer to:
People and fictional characters
* Henry (given name), including lists of people and fictional characters
* Henry (surname)
* Henry, a stage name of François-Louis Henry (1786–1855), French baritone
Arts and entertainmen ...
for the
Battle of Ceuta in Morocco. His mother had died the previous month, giving each of her sons on her deathbed an
arming sword
In the European High Middle Ages, the typical sword (sometimes academically categorized as the knightly sword, arming sword, or in full, knightly arming sword) was a straight, double-edged weapon with a single-handed, cruciform (i.e., cross-shape ...
she had ordered forged for them. Peter refused to be knighted before showing valour in battle, and he was knighted along with his brothers the following day; he was also created Duke of Coimbra. His younger brother Henry was made Duke of Viseu. These were the first dukedoms created in Portugal.
On finishing a translation of Seneca's ''De Beneficiis'' in 1418, he initiated extensive travels throughout Europe, which would keep him away from Portugal for the next ten years. After meeting with
John II of Castile
John II of Castile (; 6 March 1405 – 20 July 1454) was King of Castile and León from 1406 to 1454. He succeeded his older sister, Maria of Castile, Queen of Aragon, as Prince of Asturias in 1405.
Regency
John was the son of King Henry ...
in
Valladolid
Valladolid ( ; ) is a Municipalities of Spain, municipality in Spain and the primary seat of government and ''de facto'' capital of the Autonomous communities of Spain, autonomous community of Castile and León. It is also the capital of the pr ...
, he continued to
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 ...
, where he met with the Holy Roman Emperor
Sigismund Sigismund (variants: Sigmund, Siegmund) is a German proper name, meaning "protection through victory", from Old High German ''sigu'' "victory" + ''munt'' "hand, protection". Tacitus latinises it ''Segimundus''. There appears to be an older form of ...
, and entered his service. He fought with the Imperial armies against the Turks and in the
Hussite Wars
The Hussite Wars, also called the Bohemian Wars or the Hussite Revolution, were a series of civil wars fought between the Hussites and the combined Catholic forces of Sigismund, Holy Roman Emperor, Holy Roman Emperor Sigismund, the Papacy, a ...
in
Bohemia
Bohemia ( ; ; ) is the westernmost and largest historical region of the Czech Republic. In a narrow, geographic sense, it roughly encompasses the territories of present-day Czechia that fall within the Elbe River's drainage basin, but historic ...
and was awarded the
march of Treviso in Northern Italy in 1422. In 1424 he left 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 ...
, meeting first with
Murad II
Murad II (, ; June 1404 – 3 February 1451) was twice the sultan of the Ottoman Empire, from 1421 to 1444 and from 1446 to 1451.
Early life
Murad was born in June 1404 to Mehmed I, while the identity of his mother is disputed according to v ...
, Sultan of the
Ottoman Empire
The Ottoman Empire (), also called the Turkish Empire, was an empire, imperial realm that controlled much of Southeast Europe, West Asia, and North Africa from the 14th to early 20th centuries; it also controlled parts of southeastern Centr ...
, on the island of
Patmos
Patmos (, ) is a Greece, Greek island in the Aegean Sea. It is famous as the location where, according to Christian belief, John of Patmos received the vision found in the Book of Revelation of the New Testament, and where the book was written.
...
, and then continuing to
Constantinople
Constantinople (#Names of Constantinople, see other names) was a historical city located on the Bosporus that served as the capital of the Roman Empire, Roman, Byzantine Empire, Byzantine, Latin Empire, Latin, and Ottoman Empire, Ottoman empire ...
, capital of the
Byzantine Empire
The Byzantine Empire, also known as the Eastern Roman Empire, was the continuation of the Roman Empire centred on Constantinople during late antiquity and the Middle Ages. Having survived History of the Roman Empire, the events that caused the ...
; the hopeless position of the city against the Ottoman onslaught did not fail to impress him. From Constantinople he travelled to the
Holy Land
The term "Holy Land" is used to collectively denote areas of the Southern Levant that hold great significance in the Abrahamic religions, primarily because of their association with people and events featured in the Bible. It is traditionall ...
via Alexandria and Cairo.
European travels
In 1425, Peter travelled to
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 ...
and
England
England is a Countries of the United Kingdom, country that is part of the United Kingdom. It is located on the island of Great Britain, of which it covers about 62%, and List of islands of England, more than 100 smaller adjacent islands. It ...
and visited the universities of
Paris
Paris () is the Capital city, capital and List of communes in France with over 20,000 inhabitants, largest city of France. With an estimated population of 2,048,472 residents in January 2025 in an area of more than , Paris is the List of ci ...
and
Oxford
Oxford () is a City status in the United Kingdom, cathedral city and non-metropolitan district in Oxfordshire, England, of which it is the county town.
The city is home to the University of Oxford, the List of oldest universities in continuou ...
before arriving in
Flanders
Flanders ( or ; ) is the Dutch language, Dutch-speaking northern portion of Belgium and one of the communities, regions and language areas of Belgium. However, there are several overlapping definitions, including ones related to culture, la ...
in 1426, where he spent the next two years at the
Burgundian court. After the death of the second wife of
Philip the Good
Philip III the Good (; ; 31 July 1396 – 15 June 1467) ruled as Duke of Burgundy from 1419 until his death in 1467. He was a member of a cadet line of the Valois dynasty, to which all 15th-century kings of France belonged. During his reign, ...
of Burgundy in 1425, Peter recommended his sister Isabella to him as a wife. Philip sent a delegation to Portugal in 1428–29 that included
Jan van Eyck
Jan van Eyck ( ; ; – 9 July 1441) was a Flemish people, Flemish painter active in Bruges who was one of the early innovators of what became known as Early Netherlandish painting, and one of the most significant representatives of Early Nort ...
, who painted two portraits of the Infanta. Philip and Isabella eventually married on 7 January 1430, and one of their sons became Duke
Charles the Bold
Charles Martin (10 November 1433 – 5 January 1477), called the Bold, was the last duke of Burgundy from the House of Valois-Burgundy, ruling from 1467 to 1477. He was the only surviving legitimate son of Philip the Good and his third wife, ...
of Burgundy.
In 1427, Peter wrote a famous letter to his older brother, later King Edward, on "the proper administration of the kingdoms", from Bruges. Later that year, King
Henry VI of England
Henry VI (6 December 1421 – 21 May 1471) was King of England from 1422 to 1461 and 1470 to 1471, and English claims to the French throne, disputed King of France from 1422 to 1453. The only child of Henry V of England, Henry V, he succeeded ...
(his first cousin once removed) made him a
Knight of the Garter
The Most Noble Order of the Garter is an order of chivalry founded by Edward III of England in 1348. The most senior order of knighthood in the Orders, decorations, and medals of the United Kingdom, British honours system, it is outranked in ...
(as were already his father and older brother Edward).
In 1428, Peter visited his marquisate of Treviso and the nearby
Republic of Venice
The Republic of Venice, officially the Most Serene Republic of Venice and traditionally known as La Serenissima, was a sovereign state and Maritime republics, maritime republic with its capital in Venice. Founded, according to tradition, in 697 ...
, where he was presented with a copy of the book of
Marco Polo
Marco Polo (; ; ; 8 January 1324) was a Republic of Venice, Venetian merchant, explorer and writer who travelled through Asia along the Silk Road between 1271 and 1295. His travels are recorded in ''The Travels of Marco Polo'' (also known a ...
by the doge. He later gave that book, as well as maps of the Venetian trade routes in the Orient, to his younger brother
Prince Henry the Navigator
Princy Henry of Portugal, Duke of Viseu (Portuguese language, Portuguese: ''Infante Dom (title), Dom Henrique''; 4 March 1394 – 13 November 1460), better known as Prince Henry the Navigator (), was a Infante of Portugal, Portuguese prince and a ...
. One of the maps was created by the famous Venetian cartographer
Albertinus de Virga in 1411 and possibly shows North America before it was officially discovered. This map was found in the
Alcobaça Monastery
The Alcobaça Monastery or Alcobasa Monastery (, ''Mosteiro de Santa Maria de Alcobaça'') is a Catholic monastic complex located in the town of Alcobaça, Portugal, Alcobaça (or Alcobasa, ), in central Portugal, north of Lisbon and south of Co ...
which was the main library of the Portuguese Royal family. From Venice he traveled to
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 he was received by
Pope Martin V
Pope Martin V (; ; January/February 1369 – 20 February 1431), born Oddone Colonna, was the head of the Catholic Church and ruler of the Papal States from 11 November 1417 to his death in February 1431. His election effectively ended the We ...
, and from there he continued to
Barcelona
Barcelona ( ; ; ) is a city on the northeastern coast of Spain. It is the capital and largest city of the autonomous community of Catalonia, as well as the second-most populous municipality of Spain. With a population of 1.6 million within c ...
, where he negotiated the marriage of his brother Edward with
Eleanor of Aragon as well as his own future marriage with
Isabella of Urgell
Isabella of Urgel (Aragonese: ''Isabel d'Urchel''; died 1071) was Queen of Aragon; the only daughter of Ermengol III, Count of Urgell by his first wife Adelaide of Besalú.
Isabella is mentioned in her brother Ermengol IV, Count of Urgell, Ermengo ...
, before finally returning to Portugal.
In 1433, he completed his famous six-volume work, the ''Tratado da Virtuosa Benfeitoria''.
Regent
When Peter's brother King
Edward I of Portugal
Edward ( ; 31 October 1391 – 9 September 1438), also called Edward the Philosopher King (''Duarte o Rei-Filósofo'') or the Eloquent (''o Eloquente''), was the King of Portugal from 1433 until his death. He was born in Viseu, the son of John I o ...
died in 1438, Peter's nephew
Afonso V ascended the throne as an infant. At first, the choice for regent was the Queen mother
Eleanor of Aragon. This choice was not popular among many Portuguese, because Eleanor was Aragonese. Among the Portuguese aristocracy, however, especially among nobles around Peter's half-brother
Afonso, Count of Barcelos, Eleanor of Aragon was preferred. There were also doubts about Peter's political ability. At a meeting of the
Portuguese Cortes
In the medieval Kingdom of Portugal, the Cortes was an assembly of representatives of the estates of the realm – the nobility, clergy and bourgeoisie. It was called and dismissed by the King of Portugal at will, at a place of his choosing.O' ...
summoned by Peter's brother
John, Lord of Reguengos de Monsaraz
Infante John, Constable of Portugal (, ; 13 January 1400 – 18 October 1442) was a Portuguese ''infante'' (prince) of the House of Aviz, Constable of Portugal and master of the Portuguese Order of St. James (Santiago). In Portugal, he is com ...
, Peter was appointed regent, a choice that pleased both the people and the fast-growing
bourgeoisie
The bourgeoisie ( , ) are a class of business owners, merchants and wealthy people, in general, which emerged in the Late Middle Ages, originally as a "middle class" between the peasantry and aristocracy. They are traditionally contrasted wi ...
.
In 1443, in a gesture of reconciliation, Peter created his half-brother Afonso
Duke of Braganza
The title Duke of Braganza () in the House of Braganza is one of the most important titles in the peerage of Portugal. Starting in 1640, when the House of Braganza acceded to the throne of Portugal, the male heir of the Portuguese Crown were ...
, and relations between the two seemed to return to normality. But, in 1445, the new duke of Braganza took offence because
Isabella of Coimbra
Infanta Isabel of Coimbra (Isabella of Portugal) (1 March 1432 – 2 December 1455) was a Portuguese infanta and Queen of Portugal as the first spouse of King Afonso V of Portugal.
Life
Born in Coimbra in 1432, Isabella was a daughter of the ...
, Peter's daughter was the choice for Afonso V's wife, and not one of his granddaughters. Indifferent to the intrigues, Peter continued his regency and the country prospered under his influence. It is during this period that the first subsidies for the exploration of the
Atlantic Ocean
The Atlantic Ocean is the second largest of the world's five borders of the oceans, oceanic divisions, with an area of about . It covers approximately 17% of Earth#Surface, Earth's surface and about 24% of its water surface area. During the ...
were implemented under the auspices of Peter's brother
Henry the Navigator
Princy Henry of Portugal, Duke of Viseu ( Portuguese: ''Infante Dom Henrique''; 4 March 1394 – 13 November 1460), better known as Prince Henry the Navigator (), was a Portuguese prince and a central figure in the early days of the Portuguese ...
.
Alleged Rebellion

On 9 June 1448, Peter returned control of the country to the king. Influenced by Afonso, the Duke of Braganza, Afonso V nullified all of Peter's edicts, including the ones that concentrated power in the figure of the king.
The following year, under accusations that years later would prove false, Afonso V declared Peter a rebel. The situation became unsustainable and a civil war began. It did not last long, because Peter died on 20 May 1449 during the
Battle of Alfarrobeira
The Battle of Alfarrobeira () took place on 20 May 1449. It was a confrontation between the forces commanded by King Afonso V of Portugal and his uncle Afonso, Duke of Braganza, against the army of the rebellious Peter, Duke of Coimbra. The ...
, near
Alverca. The exact conditions of his death are debatable: some say it was in combat, while others say he was assassinated by one of his own men.
With the death of Peter, Portugal fell under control of Afonso, Duke of Braganza, with a growing influence over the destiny of the country. However, Peter's regency would never be forgotten, and Peter was cited many times by his grandson King
John II of Portugal
John II (; ; 3 May 1455 – 25 October 1495), called the Perfect Prince (), was King of Portugal from 1481 until his death in 1495, and also for a brief time in 1477. He is known for reestablishing the power of the Portuguese monarchy, reinvigo ...
as his main influence. The cruel persecution of the Braganzas by John II was perhaps the response to the conspiracies that caused the fall of one of the major princes of the ''
Ínclita Geração''.
Marriage and issue
In 1428 Peter married
Isabella of Urgell
Isabella of Urgel (Aragonese: ''Isabel d'Urchel''; died 1071) was Queen of Aragon; the only daughter of Ermengol III, Count of Urgell by his first wife Adelaide of Besalú.
Isabella is mentioned in her brother Ermengol IV, Count of Urgell, Ermengo ...
, daughter of
James II, Count of Urgell
James II (in Catalan language, Catalan ''Jaume II d'Urgell'' or ''Jaume el Dissortat'' ("James the unlucky"), in Spanish ''Jaime II el desafortunado'') (1380 – 1 June 1433) was the Count of Urgell (1408–1413), Viscount of Àger, and lord of An ...
, and candidate to the throne 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 ...
at the
Compromise of Caspe
The 1412 Compromise of Caspe (''Compromiso de Caspe'' in Spanish, ''Compromís de Casp'' in Catalan) was an act and resolution of parliamentary representatives of the constituent realms of the Crown of Aragon (the Kingdom of Aragon, Kingdom of V ...
. The couple had the following children:
*
Infante Peter (1429–1466),
Constable of Portugal
Constable of Portugal ({{langx, pt, Condestável de Portugal) was an office created by King Ferdinand I of Portugal in 1382, to replace the High Standard-bearer ('' Alferes-Mor'') as the head of the Portuguese Military. It was also referred as the ...
,
Count of Barcelona
The count of Barcelona (, , , ) was the ruler of the County of Barcelona and also, by extension and according with the Usages of Barcelona, Usages and Catalan constitutions, of the Principality of Catalonia as Prince#Prince as generic for ruler, p ...
and disputed
King of Aragon
This is a list of the kings and queens of Aragon. The Kingdom of Aragon was created sometime between 950 and 1035 when the County of Aragon, which had been acquired by the Kingdom of Navarre in the tenth century, was separated from Navarre in ...
.
*
Infante John (1431–1457), married
Charlotte of Lusignan, heiress of Cyprus, in 1456. He was created titular
Prince of Antioch
Prince of Antioch was the title given during the Middle Ages to Normans, Norman rulers of the Principality of Antioch, a region surrounding the city of Antioch, now known as Antakya in Turkey. The Princes originally came from the County of Sicil ...
, and was possibly poisoned by his mother-in-law.
*
Infanta Isabella (1432–1455),
Queen of Portugal
This is a list of Portuguese monarchs who ruled from the establishment of the Kingdom of Portugal, in 1139, to the deposition of the Portuguese monarchy and creation of the Portugal, Portuguese Republic with the 5 October 1910 revolution.
Thro ...
by marriage to
Afonso V of Portugal
Afonso V (; 15 January 1432 – 28 August 1481), known by the sobriquet the African (), was King of Portugal from 1438 until his death in 1481, with a brief interruption in 1477. His sobriquet refers to his military conquests in Northern Africa. ...
. Mother of
John II of Portugal
John II (; ; 3 May 1455 – 25 October 1495), called the Perfect Prince (), was King of Portugal from 1481 until his death in 1495, and also for a brief time in 1477. He is known for reestablishing the power of the Portuguese monarchy, reinvigo ...
.
*
Infante James (1433–1459),
Cardinal
Cardinal or The Cardinal most commonly refers to
* Cardinalidae, a family of North and South American birds
**''Cardinalis'', genus of three species in the family Cardinalidae
***Northern cardinal, ''Cardinalis cardinalis'', the common cardinal of ...
and
Archbishop of Lisbon
The Metropolitan Patriarchate of Lisbon () is a Latin Church ecclesiastical territory or patriarchate, patriarchal archdiocese of the Catholic Church in Lisbon, the capital of Portugal.
Its episcopal see, archiepiscopal see is the Lisbon Cathedra ...
, lived in Italy; his tomb is in the convent church of
San Miniato al Monte
San Miniato al Monte (St. Minias on the Mountain) is a basilica in Florence, central Italy, standing atop one of the highest points in the city. It has been described as one of the finest Romanesque structures in Tuscany and one of the most scenic ...
in
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 ...
.
*
Infanta Beatrice (1435–1462), married
Adolph of Cleves, Lord of Ravenstein
Adolph of Cleves, Lord of Ravenstein, Netherlands, Ravenstein (1425–1492) was the youngest son of Adolph I, Duke of Cleves, and of his wife Marie of Burgundy, Duchess of Cleves, Marie of Burgundy, a sister of Philip the Good, Duke of Burgundy. ...
.
*
Infanta Philippa (1437–1493), a nun in the Convent of Odivelas.
*Catherine ( – between 1462 and 1466)
Ancestry
References
Bibliography
* ''The Dukes of Coimbra'' General Books LLC, 2010.
* Elbl, Ivana, "Friendship, Disasters, and Social Capital: The Silva Meneses, 1415-1481" – ''Portuguese Studies Review'', Volume 30, Issue 1, 2022, pages 39–82. Available at https://trentu.academia.edu/ivanaElbl . Accessed 7 May 2023. Deals with the Duke of Coimbra, his marriage to Isabella of Urgell, his son, his allies and friends and servants, including Aires Gomes de Silva.
* .
* .
* Sir G.F.Hill, ''History of Cyprus'' (1940), (2nd ed. CUP, 2010), vol.1 of 4.
{{DEFAULTSORT:Peter, Duke Of Coimbra
1392 births
1449 deaths
101
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*101 (number), the number
* AD 101, a year in the 2nd century AD
* 101 BC, a year in the 2nd century BC
It may also refer to:
Entertainment
* ''101'' (album), a live album and documentary by Depeche Mode
* "101" (song), a 19 ...
15th-century Portuguese people
15th-century regents
House of Aviz
Knights of the Garter
Portuguese infantes
Portuguese people of English descent
Portuguese Renaissance humanists
Regents of Portugal
Sons of kings