The next station in the dignity of rank was occupied by the knights of Calatrava, who, considering the circumstances of their origin, may be regarded as a more honourable fraternity than the brotherhood of St. James. About the year 1147, Alfonso King of Spain recovered from the Moors the fortress of Calatrava, which was the key of Toledo. The king committed it to the charge of the Knights Templars. That noble order of Christian soldiers was then in the very infancy of its career of honour, and so few were the red crosses in Spain, that they could not drive back the swelling tide of Muselman power. After retaining it for only eight years, the Templars resigned it into the hands of Don Sancho, successor of Alfonso, who endeavoured to secure for it defenders, by proposing to accord Calatrava and its lands in perpetual possession to such knights as would undertake the guarding of the fortress. The chivalry of Spain, remembering that the brave militia of the Temple had quailed before the Moors, hung back in caution and dismay; and Sancho already saw the fate of Calatrava sealed in Arabian subjection, when the cloisters of a convent rang with a cry of war which was unheard in the baronial hall. [Sidenote: Fine chivalry of a monk.] The monastery of Santa Maria de Fetero in Navarre contained a monk named Diego Velasquez, who had spent the morning of his life in arms, but afterwards had changed the mailed frock for a monastic mantle, for in days of chivalry, when religion was the master spring of action, such conversions were easy and natural. The gloom of a convent was calculated only to repress the martial spirit; but yet the surrounding memorials of military greatness, the armed warrior in stone, the overhanging banner and gauntlet, while they proved the frail nature of earthly happiness, showed what were the subjects wherein men wished for fame beyond the grave. The pomp of the choir-service, the swelling note of exultation in which the victories of the Jews over the enemies of Heaven were sung, could not but excite the heart to admiration of chivalric renown, and in moments of enthusiasm many a monk cast his cowl aside, and changed his rosary for the belt of a knight.