It is said that there was in Florence a man of very good repute, most praiseworthy in his way of life and active in his business, whose name was Ser Brunellesco di Lippo Lapi, who had had a grandfather called Cambio, who was a learned person and the son of a physician very famous in those times, named Maestro Ventura Bacherini. Now Ser Brunellesco, taking to wife a most excellent young woman from the noble family of the Spini, received, as part payment of her dowry, a house wherein he and his sons dwelt to the day of their death. This house stands opposite to one side of S. Michele Berteldi, in a close past the Piazza degli Agli. The while that he was occupying himself thus and living happily, in the year 1398 there was born to him a son, to whom he gave the name Filippo, after his own father, now dead; and he celebrated this birth with the greatest gladness possible. Thereupon he taught him in his childhood, with the utmost attention, the first rudiments of letters, wherein the boy showed himself so ingenious and so lofty in spirit that his brain was often in doubt, as if he did not care to become very perfect in them—nay, it appeared that he directed his thoughts on matters of greater utility—wherefore Ser Brunellesco, who wished him to follow his own vocation of notary, or that of his great-great-grandfather, was very much displeased. But seeing him continually investigating ingenious problems of art and mechanics, he made him learn arithmetic and writing, and then apprenticed him to the goldsmith's art with one his friend, to the end that he might learn design. And this gave great satisfaction to Filippo, who, not many years after beginning to learn and to practise that art, could set precious stones better than any old craftsman in that vocation. He occupied himself with niello and with making larger works, such as some figures in silver, whereof two, half-length prophets, are placed at the head of the altar of S. Jacopo in Pistoia; these figures, which are held very beautiful, were wrought by him for the Wardens of Works in that city; and he made works in low-relief, wherein he showed that he had so great knowledge in his vocation that his intellect must needs overstep the bounds of that art. Wherefore, having made acquaintance with certain studious persons, he began to penetrate with his fancy into questions of time, of motion, of weights, and of wheels, and how the latter can be made to revolve, and by what means they can be set in motion; and thus he made some very good and very beautiful clocks with his own hand.
Not content with this, there arose in his mind a very great inclination for sculpture; and this took effect, for Donatello, then a youth, being held an able sculptor and one of great promise, Filippo began to be ever in his company, and the two conceived such great love for each other, by reason of the talents of each, that one appeared unable to live without the other. Whereupon Filippo, who was most capable in various ways, gave attention to many professions, nor had he practised these long before he was held by persons qualified to judge to be a very good architect, as he showed in many works in connection with the fitting up of houses, such as the house of Apollonio Lapi, his kinsman, in the Canto de' Ciai, towards the Mercato Vecchio, wherein he occupied himself greatly while the other was having it built; and he did the same in the tower and in the house of Petraia, at Castello without Florence. In the Palace that was the habitation of the Signoria, he arranged and distributed all those rooms wherein the officials of the Monte had their office, and he made doors and windows there in the manner copied from the ancient, which was then little used, for architecture was very rude in Tuscany. In Florence, a little later, there was a statue of lime-wood to be made for the Friars of S. Spirito, representing S. Mary Magdalene in Penitence, to be placed in a chapel; and Filippo, who had wrought many little things in sculpture, desiring to show that he was able to succeed in large works as well, undertook to make the said figure, which, when put into execution and finished, was held something very beautiful; but it was destroyed afterwards, together with many other notable works, in the year 1471, when that church was burnt down.
He gave much attention to perspective, which was then in a very evil plight by reason of many errors that were made therein; and in this he spent much time, until he found by himself a method whereby it might become true and perfect—namely, that of tracing it with the ground-plan and profile and by means of intersecting lines, which was something truly most ingenious and useful to the art of design. In this he took so great delight that he drew with his own hand the Piazza di S. Giovanni, with all the compartments of black and white marble wherewith that church was incrusted, which he foreshortened with singular grace; and he drew, likewise, the building of the Misericordia, with the shops of the Wafer-Makers and the Volta de' Pecori, and the column of S. Zanobi on the other side. This work, bringing him praise from craftsmen and from all who had judgment in that art, encouraged him so greatly that it was not long before he put his hand to another and drew the Palace, the Piazza, and the Loggia of the Signori, together with the roof of the Pisani and all the buildings that are seen round that Piazza; and these works were the means of arousing the minds of the other craftsmen, who afterwards devoted themselves to this with great zeal. He taught it, in particular, to the painter Masaccio, then a youth and much his friend, who did him credit in this art that Filippo showed him, as it is apparent from the buildings in his works. Nor did he refrain from teaching it even to those who worked in tarsia, which is the art of inlaying coloured woods; and he stimulated them so greatly that he was the source of a good style and of many useful changes that were made in that craft, and of many excellent works wrought both then and afterwards, which have brought fame and profit to Florence for many years.
Now Messer Paolo dal Pozzo Toscanelli, returning from his studies, and chancing one evening to be at supper in a garden with some of his friends, invited Filippo, who, hearing him discourse on the mathematical arts, formed such an intimacy with him that he learnt geometry from Messer Paolo; and although Filippo had no learning, he reasoned so well in every matter with his instinct, sharpened by practice and experience, that he would many times confound him. And so he went on to give attention to the study of the Christian Scriptures, never failing to be present at the disputations and preachings of learned persons, from which he gained so much advantage, by reason of his admirable memory, that the aforesaid Messer Paolo was wont to extol him and to say that in hearing Filippo argue he appeared to be hearing a new S. Paul. He also gave much attention at this time to the works of Dante, which he understood very well with regard to the places described and their proportions, and he would avail himself of them in his conversations, quoting them often in making comparisons. He did naught else with his thoughts but invent and imagine ingenious and difficult things; nor could he ever find an intellect more to his satisfaction than that of Donato, with whom he was ever holding familiar discourse, and they took pleasure in one another and would confer together over the difficulties of their vocation.
Now in those days Donato had finished a Crucifix of wood, which was placed in S. Croce in Florence, below the scene of the child being restored to life by S. Francis, painted by Taddeo Gaddi, and he wished to have the opinion of Filippo about this work; but he repented, for Filippo answered that he had placed a ploughman on the Cross; whence there arose the saying, "Take wood and make one thyself," as it is related at length in the Life of Donato. Whereupon Filippo, who would