'Saint James the Greater' is one of the Twelve Apostles of Jesus Christ and one of the world's most popular saints. Saint James, Saint Jacob or Sant Iago as he is known in the Galician language, is also the patron saint of Galicia. July 25th, St. James' Day, is Galicia’s National Day.
Tradition has it that after James’ death his relics were taken to Spain and laid secretly in Galicia, where they were eventually forgotten. During the 9th century AD his burial place was re-discovered and his shrine became one of the three most important Christian pilgrimage destinations in the world, together with Jerusalem and Rome.
Read more: https://www.celticcountries.com/traditions/35-james-the-patron-saint-of-galicia