Ferdinand I of Aragon, also known as Ferdinand of Antequera, was born in 1380 and died in 1416. He was originally an Infante of Castile, the son of King John I of Castile and Eleanor of Aragon. After serving as regent of Castile and gaining fame for capturing Antequera in 1410 (hence his nickname), he became King of Aragon in 1412 through the Compromise of Caspe, which resolved the succession crisis after King Martin’s death. As king, he ruled Aragon, Valencia, Majorca, Sardinia, and Corsica, as well as holding the title of Count of Barcelona. Ferdinand worked to strengthen royal authority and maintain balance among the diverse territories of the Crown of Aragon. He was the founder of the Trastámara dynasty in Aragon, and his reign paved the way for the later unification of Spain under his grandson Ferdinand II, who married Isabella of Castile.