To the above-named Girolamo, at Cesena, in the year 1518, the while that he was accompanying the Duke his master in exile, there was born a son called Bartolommeo, who was brought up by him very decently, and then, when he was well grown, placed to learn grammar, in which he made more than ordinary proficience. Afterwards, when he was eighteen years of age, the father, perceiving that he was inclined more to design than to letters, caused him to study design under his own discipline for about two years: which finished, he sent him to study design and painting in Florence, where he knew that the true study of that art was to be found, on account of the innumerable works by excellent masters that are there, both ancient and modern. Living in that place, and attending to design and to architecture, Bartolommeo formed a friendship with Giorgio Vasari, the painter and architect of Arezzo, and with the sculptor Bartolommeo Ammanati, from whom he learned many things appertaining to art. Finally, after having been three years in Florence, he returned to his father, who was then attending to the building of S. Giovanni Battista at Pesaro. Whereupon, the father having seen the designs of Bartolommeo, it appeared to him that he acquitted himself much better in architecture, for which he had a very good inclination, than in painting; wherefore, keeping him under his own care some months, he taught him the methods of perspective. And afterwards he sent him to Rome, to the end that he might see the marvellous buildings, both ancient and modern, that are there, of which, in the four years that he stayed there, he took the measurements, and made therein very great proficience. Then, on his way back to Urbino, passing through Florence in order to see Francesco[9] San Marino, his brother-in-law, who was living there as engineer to the Lord Duke Cosimo, Signor Stefano Colonna da Palestrina, at that time general to that lord, having heard of his ability, sought to engage him with himself, with a good salary. But he, being much indebted to the Duke of Urbino, would not attach himself to others, and returned to Urbino, where he was received by that Duke into his service, and ever afterwards held very dear. [Footnote 9: Giovan Battista.]