Patronages of Saint George Aragon it is a public holiday, celebrated as the 'National Day of Aragon'. It is also a public holiday in Castile and Leon, where the day commemorates the defeat at the Revolt of the Comuneros. Apparently, the English crusaders who helped King Afonso Henriques (1109–85) in the conquest of Lisbon in 1147 introduced a devotion to Saint George to Portugal. Nevertheless, it was not until the time of King Afonso IV (1291–1357) that the use of "São Jorge!!" (Saint George) as a battle cry, substituted for the former "Sant'Iago!!" (Saint James). Nuno Álvares Pereira (1360–1431), Saint Constable of Portugal, considered
Portugal son-in-law of Ferdinand I of Portugal, claimed the throne of Portugal. A faction of petty noblemen and commoners, led by John of Aviz (later King John I of Portugal) and commanded by General Nuno Álvares Pereira defeated the Castilians in the Battle of Aljubarrota. With this battle, the House of Aviz became the ruling house of Portugal. Portugal spearheaded European exploration of the world and the Age of Discovery. Prince Henry the Navigator, son of King João I, became the main sponsor and patron of this endeavour. During this period, Portugal explored the Atlantic Ocean, discovering several Atlantic archipelagos like