The battle of St. Quintin, in August 1557, which saw the triumph of the Spanish arms over the French, was an event of extreme moment, and was the source of Philip’s resolve to erect the Escorial. In this engagement the Duke of Savoy, at the head of the Spanish troops, D’Egmont, in command of the Dutch and German horsemen and infantry, and Lord Pembroke with his force of British soldiers, defeated the army of France, and killed three thousand men. During the height of the battle, which was fought on the day dedicated to San Lorenzo, Philip besought the assistance of that saint, and vowed that if aid were vouchsafed, he would build a mighty and permanent monument to the deliverer. The French general was the Duke de Nevers, who was assisted by the Constable of France, Montmorency. To Coligni, the great admiral, was given the task of augmenting the garrison of St. Quintin. The troops of France were nevertheless greatly outnumbered by the Spanish forces. Flemings, Englishmen, and Spaniards, in combined array, made desperate assault upon the defenders of St. Quintin. In a last rally the French formed squares, but the artillery of the Duke of Savoy broke up their ranks. Montmorency was among the prisoners who were seized by the Spanish, and it is recorded that he was treated with considerate courtesy. It is probable that another motive in addition to gratitude to San Lorenzo actuated Philip II. in building the monastery of the Escorial. He was under an obligation by the will of Charles V. to erect a royal burial-place, and the example of his father in yielding the crown for the ascetic life of the cloister may have induced him to add a religious house to the mausoleum, and to provide a retreat for himself in the closing days of his reign. Whatever may have inspired the resolution, it is quite evident that the idea took passionate possession of the king’s mind, and that he spent vast treasure and much industry upon the work of rearing this extraordinary conglomerate pile. The choice of a situation for the building accords with all that we know of Philip’s trend of thought and feeling in middle life. He was not hasty in determining the position for the upraising of his monument. The place must be solitary, stern, and amid impressive surroundings, where nature is seen in a mood of perennial musing and melancholy. No doubt the king wandered often in the wastes of Castile, among the rocks, the treeless plains, and the mountainous surrounding of Madrid, in quest of a suitable site for his hermitage and sanctuary. It was necessary, in a material sense, that the district should produce an abundance of stone of a durable quality.