Portuguese interregnum begins after Ferdinand I dies

1383

The childless Portuguese king died, leaving his daughter Beatrice married to Castile's John I, who claimed the Portuguese throne through her. Lisboeta merchants and the master of Aviz, John, refused to be absorbed by Castile, rallying popular support against foreign rule. Their revolt would deliver Portugal's independence at Aljubarrota two years later and launch the Avis dynasty.