Person

John I of Castile

1358–1390 · 14th century

John I was king of Castile from 1379 to 1390, the son of Henry II and second king of the House of Trastámara. Married to Beatrice of Portugal, he claimed the Portuguese throne in 1383, but his army was defeated at Aljubarrota in 1385 by John I of Portugal. At home he reorganised the royal council and created the title Prince of Asturias for the heir.

John I of Castile
Image: Jaume Serra · Public domain · Wikimedia Commons
Cite this entry
APA
The Epoch Institute. (2026). John I of Castile. In The Epoch Institute Encyclopedia. https://the-epoch-institute.org/encyclopedia/john-i-of-castile
MLA
“John I of Castile.” The Epoch Institute Encyclopedia, The Epoch Institute, 2026, https://the-epoch-institute.org/encyclopedia/john-i-of-castile. Accessed .
Chicago
The Epoch Institute. “John I of Castile.” The Epoch Institute Encyclopedia. 2026. https://the-epoch-institute.org/encyclopedia/john-i-of-castile.
Harvard
The Epoch Institute (2026) ‘John I of Castile’, The Epoch Institute Encyclopedia. Available at: https://the-epoch-institute.org/encyclopedia/john-i-of-castile (Accessed: ).

Last reviewed October 2026Random entry ↻