John I of Portugal
King of Portugal and Algarve

Born
April 11th, 1357
668 years ago
Died
August 14th, 1433
591 years ago — 76 years old
Category
Leaders & Politicians
Country
Portugal
Links & References
Ruled as King of Portugal from 1385 until death in 1433. Achieved significant stability and growth in Portugal during the late 14th and early 15th centuries. Strengthened ties with England through the Treaty of Windsor in 1386. Promoted exploration along the African coast, laying groundwork for future expeditions. His reign marked the beginning of a period of expansion for Portugal as a maritime power.
Secured Portuguese sovereignty at the Battle of Aljubarrota
Established the Avis Dynasty
Strengthened English alliance through the Treaty of Windsor
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