Saint George in devotions, traditions and prayers was specially devoted to the saint and declared him the patron saint of Portugal. In the fifteenth and sixteenth centuries, Portuguese explorers carried the devotion across the oceans to India and South America. After the thirteenth century, a large portion of the art, iconography and legendary traditions associated with Saint George and many festivals that celebrate him involve the legend of Saint George and the Dragon. The association of Saint George with the dragon was not attested to until the twelfth century version of "Miracula Sancti Georgii" (Codex Romanus Angelicus 46, pt. 12, written in Greek). Jacobus De Voragine, the
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