With the election of Nicholas V. (1447-55)[8] the triumph of Humanism at Rome seemed secure. The new Pope was himself one of the party. As a tutor in Florence he had been brought into contact with the great literary men of the time and had become an ardent student of the classics, nor did his enthusiasm lose any of its ardour when he ascended the Papal throne. His aim was to make Rome the intellectual as well as the religious capital of the world, and with this object in view he invited to his court the most distinguished scholars of the age, and bestowed upon not a few of them, such as Albergati, Capranica, and Caesarini the rank of cardinal. That he fully recognised the advantages which religion might derive from the revival of letters, and that he aimed at employing the services of the Humanists in defence of Christianity is evident from the works to which he directed the attention of scholars. The texts of the Scripture, the translations of the Greek Fathers, and the preparation of critical studies on the Lives of the Saints were amongst the works recommended to his literary friends. At the same time he did not proclaim war upon the less orthodox of the Humanist school. Men like Valla, Poggio, Filelfo, and Marsuppini were treated with friendliness and even with favour. Whether such a line of conduct was dictated by prudence and by the hope of winning over these scholars to a better understanding, or whether his anxiety for the success of his own literary schemes blinded him to the serious excesses of such leaders it is difficult to say; but, at any rate, it serves to show the great liberty enjoyed by literary men at this period even in the very city of the Popes. As a means of ensuring to Rome the most prominent place in the revival, agents were dispatched to Greece, Turkey, Germany, France, and even to Sweden and Norway, to hunt for manuscripts. No expense was spared to secure everything that could be purchased or to have copies made where purchase was impossible. In order to preserve these treasures and make them available for scholars the Vatican Library was undertaken by orders of the Pope. Though long before this time the library of the Popes was of considerable importance, yet on account of the immense number of volumes produced by Nicholas V. he is generally regarded as the founder of the Vatican Library. The number of volumes which it contained at the time of his death is variously estimated at from one to nine thousand. The works of the Fathers of the Church, and the Scholastics and Canonists were well represented.[9]