The rude sierra now swarmed with life. The ground was covered with tents and huts. The busy hum of labour mingled with the songs of the labourers, which, from their various dialects, betrayed the different, and oftentimes distant, provinces from which they had come. In this motley host the greatest order and decorum prevailed; nor were the peaceful occupations of the day interrupted by any indecent brawls. As the work advanced, Philip's visits to the Escorial were longer and more frequent. He had always shown his love for the retirement of the cloister, by passing some days of every year in it. Indeed, he was in the habit of keeping Holy Week not far from the scene of his present labours, at the convent of Guisando. In his present monastic retreat he had the additional interest afforded by the contemplation of the great work, which seemed to engage as much of his thoughts as any of the concerns of government. Philip had given a degree of attention to the study of the fine arts seldom found in persons of his condition. He was a connoisseur in painting, and, above all, in architecture, making a careful study of its principles, and occasionally furnishing designs with his own hand.[456] No prince of his time left behind him so many proofs of his taste and magnificence in building. The royal mint at Segovia, the hunting-seat of the Pardo, the pleasant residence of Aranjuez, the alcazar of Madrid, the "Armeria Real," and other noble works which adorned his infant capital, were either built or greatly embellished by him. The land was covered with structures both civil and religious, which rose under the royal patronage. Churches and convents--the latter in lamentable profusion--constantly met the eye of the traveller. The general style of their execution was simple in the extreme. Some, like the great cathedral of Valladolid, of more pretension, but still showing the same austere character in their designs, furnished excellent models of architecture to counteract the meretricious tendencies of the age. Structures of a different kind from these were planted by Philip along the frontiers in the north and on the southern coasts of the kingdom; and the voyager in the Mediterranean beheld fortress after fortress crowning the heights above the shore, for its defence against the Barbary corsair. Nor was the king's passion for building confined to Spain. Wherever his armies penetrated in the semi-civilized regions of the New World, the march of the conqueror was sure to be traced by the ecclesiastical and military structures which rose in his rear.