Saint George's Day city to the Christians. Devotions to Saint George in Portugal date back to the twelfth century, and Saint Constable attributed the victory of the Portuguese against what is now mostly modern day Spain, in the battle of Aljubarrota in the fourteenth century to Saint George. During the reign of King John I (1357–1433) Saint George became the patron saint of Portugal and the King ordered that the saint's image on the horse be carried in the Corpus Christi procession. In fact, the Portuguese Army motto means Portugal and Saint George, in perils and in efforts of war. In tradition-rich Buttenheim,
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