As it is detailed in the Gospels, Saint James (also called Santiago) and Saint John, fishers, sons of Zebedee, were called by Jesus in the shore of the lake of Galilee. Due to their vehemence, the Lord called them “sons of thunder”. Saint James was the first apostle to die as a martyr of Christ in Jerusalem. According to the tradition, he preached the Gospel in Spain, where he was encouraged by the apparition of the Virgin Mary in Zaragoza. After his martyrdom, their disciples brought his body to Galicia. There, his sepulchre is worshipped in the city of Santiago de Compostela. It is the end of the Way of Saint James, which covers all central Europe. His feast day is celebrated on 25th of July, and when this date falls on a Sunday, that year is considered as a Jacobean Year. During the Reconquest of Spain, the Christians – especially the Navarrese and the Galician, Leoneses and Castilians – considered Saint James as their protector. Moreover, a legend narrates the Battle of Clavijo (in La Rioja) in the year 844, where the King Ramiro I of Asturias defeated the Muslims with the aid of Saint James the Greater. The Apostle appeared riding a white horse, such as he is portrayed in the painting of this chapel. It deals with a tradition subsequent to the real battle, which took place in Albelda (La Rioja), although the historical records do not mention the apparition of Saint James.