John I of Portugal

MedievalEmperorPortugal1357 — 1433

Founder of the House of Aviz, king of Portugal.

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Quick Facts

Born

1357

Died

1433

Country

Portugal

Era

Medieval

Occupation

Emperor

Score Overview

Military (10%)65

Political (20%)55

Influence (20%)57

Legacy (20%)58

Leadership (15%)72

Strategy (15%)61

Total Score60.3

John I of Portugal — Complete Timeline

1385 AD

Battle of AljubarrotaWar

John I led Portuguese forces to a decisive victory over the Castilian army at Aljubarrota. This battle secured Portuguese independence and solidified John's claim to the throne.

BattleIndependenceCastile

Impact: regionalconstructive

Accession to the thronePolitical Action

John I became King of Portugal after the 1383-1385 Crisis, being elected by the Cortes of Coimbra. His accession ended the Burgundian dynasty and founded the House of Aviz.

SuccessionDynastyAviz

Impact: nationalconstructive

1386 AD

Treaty of WindsorPolitical Action◆ Major

John I signed the Treaty of Windsor with England, establishing a perpetual alliance between Portugal and England. This alliance, the oldest in the world, has endured to the present day.

TreatyAllianceEngland

Impact: globalconstructive

1415 AD

Conquest of CeutaWar◆ Major

John I led the conquest of Ceuta in North Africa, marking the beginning of Portuguese overseas expansion. The capture of the city opened the era of European colonialism.

ConquestColonialismNorth Africa

Impact: global