Much of the influence acquired by Cosimo, and transmitted to his descendants, was due to sympathy with the intellectual movement of the age. He had received a solid education; and though he was not a Greek scholar, his mind was open to the interests which in the fifteenth century absorbed the Florentines. He collected manuscripts, gems, coins, and inscriptions, employing the resources of his banking house and engaging his commercial agents in this work. Painters and sculptors, no less than scholars and copyists, found in him a liberal patron. At the death of his son Piero the treasures of the Casa Medici, not counting plate and costly furniture, were valued at 30,000 golden florins.[133] The sums of money spent by him in building were enormous. It was reckoned that, one year with another, he disbursed from 15,000 to 18,000 golden florins annually in edifices for the public use.[134] Of these the most important were the Convent of S. Marco, which altogether cost about 70,000 florins; S. Lorenzo, which cost another 40,000; and the Abbey of Fiesole. On his own palace he expended 60,000 florins, while the building of his villas at Careggi and Cafaggiuolo implied a further large expenditure. Not a shilling of this money was wasted; for while Cosimo avoided the reproach of personal extravagance, he gave work to multitudes of labourers, who received their wages regularly every Saturday at his office. To this free use of wealth in the employment of artisans may be ascribed the popularity of the Medici with the lower classes, which was more than once so useful to them at a perilous turn of fortune.
Comprehending the conditions under which tyranny might be successfully practised in the fifteenth century, Cosimo attached great value to this generosity. He used, in later life, to regret that 'he had not begun to spend money upon public works ten years earlier than he did.'[135] Every costly building that bore his name, each library he opened to the public, and all the donations lavished upon scholars served the double purpose of cementing the despotism of his house and of gratifying his personal enthusiasm for culture. Superstition mingled with these motives of the tyrant and the dilettante. Knowing that much of his wealth had been ill-gotten, he besought the Pope, Eugenius, to indicate a proper way of restitution. Eugenius advised him to spend 10,000 florins on the Convent of S. Marco. Thereupon Cosimo laid out considerably more than four times that sum, adding the famous Marcian Library, and treating the new foundation of the Osservanza, one of the Pope's favourite crotchets, with more than princely liberality.[136]
Of his generosity to men of letters the most striking details are recorded. When Niccolo de' Niccoli ruined himself by buying books, Cosimo opened for him an unlimited credit with the Medicean bank. The cashiers received orders to honour the old scholar's drafts; and in this way Niccolo drew 500 ducats for his private needs.[137] Tommaso Parentucelli was treated with no less magnificence. As Bishop of Bologna, soon after his patron Albergati's death, he found himself with very meagre revenues and no immediate prospect of preferment. Yet the expenses of his station were considerable, and he had occasion to request a loan from the Medici. Cosimo issued a circular letter to his correspondents, engaging them to supply Tommaso with what sums of money he might want.[138] When the Bishop of Bologna assumed the tiara, with the name of Nicholas V., he rewarded Cosimo by making him his banker; and the Jubilee bringing 100,000 ducats into the Papal treasury, the obligation was repaid a hundredfold.[139]
The chief benefit conferred by Cosimo de' Medici on learning was the accumulation and the housing of large public libraries. During his exile (Oct. 3, 1433—Oct. 1, 1434) he built the Library of S. Giorgio Maggiore at Venice, and after his return to Florence he formed three separate collections of MSS. While the hall of the Library of S. Marco was in process of construction, Niccolo de' Niccoli died, in 1437, bequeathing his 800 MSS., valued at 6,000 golden florins, to sixteen trustees. Among these were Cosimo and Lorenzo de' Medici, Ambrogio Traversari, Lionardo Bruni, Carlo Marsuppini, Poggio Bracciolini, Giannozzo Manetti, and Franco Sacchetti. At the same time the estate of Niccolo was compromised by heavy debts. These debts Cosimo cancelled, obtaining in exchange the right to dispose of the library. In 1441 the hall of the convent was finished. Four hundred of Niccolo's MSS. were placed there, with this inscription upon each: Ex hereditate doctissimi viri Nicolai de Nicolis de Florentiâ. Tommaso Parentucelli made a catalogue at Cosimo's request, in which he not only noted the titles of Niccoli's books, but also marked the names of others wanting to complete the collection. This catalogue afterwards served as a guide to the founders of the libraries of Fiesole, Urbino, and Pesaro, and was, says Vespasiano, indispensable to book-collectors.[140] Of the remaining 400 volumes Cosimo kept some for his own (the Medicean) library, and some he gave to friends. At the same time he spared no pains in adding to the Marcian collection. His agents received instructions to buy codices, while Vespasiano and Fra Giuliano Lapaccini were employed in copying rare MSS. As soon as Cosimo had finished building the Abbey of Fiesole, he set about providing this also with a library suited to the wants of learned ecclesiastics. Of the method he pursued, Vespasiano, who acted as his agent, has transmitted the following account:[141]—'One day, when I was in his room, he said to me, "What plan can you recommend for the formation of this library?" I answered that to buy the books would be impossible, since they could not be purchased. "What, then, do you propose?" he added. I told him that they must be copied. He then asked if I would undertake the business. I replied that I was willing. He bade me begin at my leisure, saying that he left all to me; and for the monies wanted day by day, he ordered that Don Arcangelo, at that time prior of the monastery, should draw cheques upon his bank, which should be honoured. After beginning the collection, since it was his will that it should be finished with all speed possible, and money was not lacking, I soon engaged forty-five copyists, and in twenty-two months provided two hundred volumes, following the admirable list furnished by Pope Nicholas V.' The two libraries thus formed by Cosimo for the Convents of S. Marco and Fiesole, together with his own private collections, constitute the oldest portion of the present Laurentian Library. On the title-pages of many venerable MSS. may still be read inscriptions, testifying to the munificence of the Medici, and calling upon pious students to remember the souls of their benefactors in their prayers[142]—Orato itaque lector ut gloria et divitiæ sint in domo ejus justitia ejus et maneat in sæculum sæculi.
Cosimo's zeal for learning was not confined to the building of libraries or to book-collecting. His palace formed the centre of a literary and philosophical society, which united all the wits of Florence and the visitors who crowded to the capital of culture. Vespasiano expressly states that 'he was always the father and benefactor of those who showed any excellence.'[143] Distinguished by versatility of tastes and comprehensive intellect, he formed his own opinion of the men of eminence with whom he came in contact, and conversed with each upon his special subject. 'When giving audience to a scholar, he discoursed concerning letters; in the company of theologians he showed his acquaintance with theology, a branch of learning always studied by him with delight. So also with regard to philosophy. Astrologers found him well versed in their science, for he somewhat lent faith to astrology and employed it on certain private occasions. Musicians in like manner perceived his mastery of music, wherein he much delighted. The same was true about sculpture and painting; both of these arts he understood completely, and showed great favour to all worthy craftsmen. In architecture he was a consummate judge, for without his opinion and advice no building was begun or carried to completion.'[144]
The discernment of character, possessed by Cosimo in a very high degree, not only enabled him to extend enlightened patronage to arts and letters, but also to provide for the future needs of erudition. Stimulated by the presence of the Greeks who crowded Florence during the sitting of the Council in 1438, he formed a plan for encouraging Hellenic studies. It was he who founded the Platonic Academy, and educated Marsilio Ficino, the son of his physician, for the special purpose of interpreting Greek philosophy. Ficino, in a letter to Lorenzo de' Medici, observes that during twelve years he had conversed with Cosimo on matters of philosophy, and always found him as acute in reasoning as he was prudent and powerful in action. 'I owe to Plato much, to Cosimo no less. He realised for me the virtues of which Plato gave me the conception.' Thus the man whose political cynicism is enshrined in such apophthegms as these:—'A few ells of scarlet would fill Florence with citizens;' 'You cannot govern a State with paternosters;' 'Better the city ruined than the city lost to us'—must, by his relations to scholars and his enthusiasm for culture, still command our admiration and respect.
Among the friends of Cosimo, to whose personal influence at Florence the Revival of Learning owed a vigorous