John I, 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 a succession war with Castile, preserving his country's independence and establishing the Aviz dynasty on the Portuguese throne. His long reign of 48 years, the most extensive of all Portuguese monarchs, saw the beginning of Portugal's overseas expansion. John's well-remembered reign in his country earned him the epithet of Fond Memory.
- Occupation
- politician
- Position held
- Monarch of Portugal, Grand Master of the Order of Aviz
- Citizenship
- Kingdom of Portugal
- Born
- April 11, 1357
