Afonso IV, known as "the Brave" (o Bravo), reigned as King of Portugal from 1325 until his death in 1357. He was born on 8 February 1291 in Lisbon, the only legitimate son of King Denis of Portugal and Elizabeth of Aragon. Despite facing numerous challenges during his rule, Afonso IV left a lasting impact on the nation's history through his military exploits, support for maritime exploration, and the dramatic events surrounding his son's ill-fated love affair.