The castle behind Villamayor has a long history. The Romans were here over 2000 years ago and it is believed the castle is built on Roman ruins. Then the Moors came, later the kings of Navarre and also Charles the Great (Charlemagne 742-814) spent time here. There is a story that Charles, unwilling for his men to die in battle asked Santiago (Saint James) which of his men were going to die in a forthcoming battle. Red crosses appeared on the shields of 150 men, so he left these men in the camp. He went into battle and lost no men in battle. When he returned to the camp the 150 men were dead, or so the story goes.
It is clear when you get to the top of the mountain why the castle is here. There are magnificent views in every direction. Anyone who held this point would have a magnificent advantage in battle.