The Tree of Europe · Person

Peter IV of Aragon

«the Ceremonious»

He brought Majorca back under his rule and fought Peter I of Castile. His reign strengthened royal ceremonial and left an important autobiographical chronicle.

1319 – 1387King of AragonBarcelona · ES

Explore this family · Spanish Atlas Back to people

Posthumous portraitPeter IV the CeremoniousJaume Mateu · 1427Museu Nacional d’Art de Catalunya, BarcelonaPublic domain · PDM 1.0 · Source

This complete profile is available in English. Bibliographic titles retain their original language. Links marked ES open the Spanish edition.

Historical profile

Key details

Birth: 1319 Documented

Death: 5 January 1387 Documented

Role: King of Aragon

Dynasty: Barcelona · ES

Territories: Aragon (ES) · Trinacria (ES) · County of Barcelona (ES) · Valencia (ES) · Majorca (ES) · Sardinia (ES) · Athens (ES) · Duchy of Neopatras (ES)

Recorded governments and reigns

King · Aragon · Reign Documented1336–1387Effective rule

King · Trinacria · Reign Pending review1338–1387ClaimA dynastic claim; it does not represent continuous effective rule over Sicily.

Count · County of Barcelona · County Pending review1336–1387Effective rule

King · Valencia · Reign Pending review1336–1387Effective rule

King · Majorca · Reign Pending review1343–1387Effective rule

King · Sardinia · Reign Pending review1336–1387Effective rule

Duke · Athens · Duchy Documented1377–1379ClaimHe assumed the title on Frederick III’s death, in opposition to Mary of Sicily’s inheritance.

Duke · Duchy of Neopatras · Duchy Documented1377–1379ClaimHe assumed the title in 1377, when the duchy had been reduced almost to its capital.

Duke · Athens · Duchy Documented1380–1387Effective ruleHe accepted the sovereignty that the Company had offered to his wife Eleanor of Sicily and united the duchies with the Crown in 1380.

Duke · Duchy of Neopatras · Duchy Documented1380–1387Effective ruleUnited with the Crown alongside Athens in 1380.

Family network

Recorded relationships

Parents

Alfonso IV of Aragon · ESDocumentedTeresa d’Entença · ESPending review

Partners

Eleanor of Sicily · ESPending reviewSibylla of Fortià · ESPending reviewMaria of Navarre · ESPending review

Children

Martin I of Aragon · ESJohn I of Aragon · ESEleanor of Aragon · ES

Crowns and unions

Their titles over time

Follow the changing territories and offices of Peter IV of Aragon. Each title retains its own status.

Period

Governments in 1380

Crown of Aragon7 titles and offices
View titles and jurisdictions
- Aragon · ESKing · Effective rule1336–1387
- County of Barcelona · ESCount · Effective rule1336–1387
- Valencia · ESKing · Effective rule1336–1387
- Majorca · ESKing · Effective rule1343–1387
- Sardinia · ESKing · Effective rule1336–1387
- Athens · ESDuke · Effective rule1380–1387 · He accepted the sovereignty that the Company had offered to his wife Eleanor of Sicily and united the duchies with the Crown in 1380.
- Duchy of Neopatras · ESDuke · Effective rule1380–1387 · United with the Crown alongside Athens in 1380.
The kingdoms and territories of the Crown retained their own institutions. Source for this grouping

Nominal and disputed titles (1)

Trinacria · ESKing · Claim1338–1387 · A dynastic claim; it does not represent continuous effective rule over Sicily.

Annual dates: overlap within one year does not prove that two offices were held on the same day. Regencies and co-rulerships retain their labels.

Documentation

Sources for this profile

Biographical and contextual references in their original language. Sources and methodology.

Evidence for this profile

17 recorded claims · 9 without a claim-specific source. Context references do not by themselves verify every fact.

Dates (2/2 with a precise source)

BirthDocumented
1319
The authority record gives the birth as 1319.
Deutsche Nationalbibliothek · GND · Peter IV., Aragonien, König · Vital data: birth date
Reviewed on 2026-10-17 by El Árbol de Europa ·
DeathDocumented
5 January 1387
The authority record gives the death as 1387-01-05.
Deutsche Nationalbibliothek · GND · Peter IV., Aragonien, König · Vital data: death date
Reviewed on 2026-10-17 by El Árbol de Europa ·

Family and relationships (1/5 with a precise source)

FatherDocumented
Alfonso IV of Aragon
The authority record identifies Alfonso IV of Aragon (GND 118859080) as father.
Deutsche Nationalbibliothek · GND · Peter IV., Aragonien, König · Relationships: father → GND 118859080
Reviewed on 2026-10-17 by El Árbol de Europa ·
MotherPending review
Teresa d’Entença
A precise source has not yet been added.
No individual review recorded ·
Marriage or partnershipPending review
Eleanor of Sicily
A precise source has not yet been added.
No individual review recorded ·
Marriage or partnershipPending review
Sibylla of Fortià
A precise source has not yet been added.
No individual review recorded ·
Marriage or partnershipPending review
Maria of Navarre
A precise source has not yet been added.
No individual review recorded ·

Governments (5/10 with a precise source)

GovernmentDocumented
King · Aragon · 1336–1387
The authority record dates this office to 1336–1387.
Deutsche Nationalbibliothek · GND · Peter IV., Aragonien, König · Biographical data: King of Aragon, 1336–1387.
Reviewed on 2026-10-17 by El Árbol de Europa ·
GovernmentPending review
King · Trinacria · 1338–1387
A precise source has not yet been added.
No individual review recorded ·
GovernmentPending review
Count · County of Barcelona · 1336–1387
A precise source has not yet been added.
No individual review recorded ·
GovernmentPending review
King · Valencia · 1336–1387
A precise source has not yet been added.
No individual review recorded ·
GovernmentPending review
King · Majorca · 1343–1387
A precise source has not yet been added.
No individual review recorded ·
GovernmentPending review
King · Sardinia · 1336–1387
A precise source has not yet been added.
No individual review recorded ·
GovernmentDocumented
Duke · Athens · 1377–1379
He assumed the title in 1377; effective union followed in 1380.
Gran Enciclopèdia Catalana · Ducat de Neopàtria · Peter the Ceremonious assumed the title in 1377, when the duchy had been reduced almost to its capital; Neopatras fell to the Florentines in 1390.
Reviewed on 2026-10-19 by El Árbol de Europa ·
GovernmentDocumented
Duke · Duchy of Neopatras · 1377–1379
He assumed the title in 1377.
Gran Enciclopèdia Catalana · Ducat de Neopàtria · Peter the Ceremonious assumed the title in 1377, when the duchy had been reduced almost to its capital; Neopatras fell to the Florentines in 1390.
Reviewed on 2026-10-19 by El Árbol de Europa ·
GovernmentDocumented
Duke · Athens · 1380–1387
He united the duchies with the Crown in 1380.
Gran Enciclopèdia Catalana · Ducat d’Atenes · The duchies passed to Frederick III of Sicily in 1355; Peter the Ceremonious accepted the sovereignty offered to Eleanor of Sicily and united them with the Crown in 1380; Nerio Acciaiuoli captured Athens in 1388.
Reviewed on 2026-10-19 by El Árbol de Europa ·
GovernmentDocumented
Duke · Duchy of Neopatras · 1380–1387
United with the Crown alongside the Duchy of Athens in 1380.
Gran Enciclopèdia Catalana · Ducat d’Atenes · The duchies passed to Frederick III of Sicily in 1355; Peter the Ceremonious accepted the sovereignty offered to Eleanor of Sicily and united them with the Crown in 1380; Nerio Acciaiuoli captured Athens in 1388.
Reviewed on 2026-10-19 by El Árbol de Europa ·

Biographical and contextual references (3)

Editorial history

2026-10-12 · Claim registry added; existing historical data kept. Specific sourcing remains to be reviewed.
2026-10-08 · Claim registry added; existing historical data kept. Specific sourcing remains to be reviewed.
2026-10-04 · Claim registry added; existing historical data kept. Specific sourcing remains to be reviewed.
2026-10-04 · Claim registry added; existing historical data kept. Specific sourcing remains to be reviewed.
2026-10-03 · Claim registry added; existing historical data kept. Specific sourcing remains to be reviewed.
2026-09-30 · The duchy is limited to Dijon and Autun; each other fief now enters the map only under its dated ruler. John III of Namur and the Nevers/Rethel branch were added. The previous shape combined later counties and unrelated lands as if all belonged to the duchy from 1363.
2026-09-28 · Claim registry added; existing historical data kept. Specific sourcing remains to be reviewed.

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