ALPHONSO IV. was born in 1290, and in 1325 succeeded his father, Dionis, whose death he had hastened by his intrigues and rebellions. Hostilities with the Castilians and with the Moors occupied many years of his reign, during which he gained some successes; but by consenting to the barbarous murder of Inez de Castro, who was secretly espoused to his son Peter, he has fixed an indelible stain on his character. Enraged at this barbarous act, Peter put himself at the head of an army and devastated the whole of the country between the Douro and the Minho before he was reconciled to his father. Alphonso died almostimmediately after, on the 12th of May 1357.
Note - this article incorporates content from Encyclopaedia Britannica, Eleventh Edition, (1910-1911)