I will begin, then, with architecture, as the most universal and the most necessary and useful to men, and as that for the service and adornment of which the two others exist; and I will expound briefly the varieties of stone, the manners or methods of construction, with their proportions, and how one may recognize buildings that are good and well-conceived. Afterwards, discoursing of sculpture, I will tell how statues are wrought, the form and the proportion that are looked for in them, and of what kind are good sculptures, with all the most secret and most necessary precepts. Finally, treating of painting, I will speak of draughtsmanship, of the methods of colouring, of the perfect execution of any work, of the quality of the pictures themselves, and of whatsoever thing appertains to painting; of every kind of mosaic, of niello, of enamelling, of damascening, and then, lastly, of the printing of pictures. And in this way I am convinced that these my labours will delight those who are not engaged in these pursuits, and will both delight and help those who have made them a profession. For not to mention that in the Introduction they will review the methods of working, and that in the Lives of the craftsmen themselves they will learn where their works are, and how to recognize easily their perfection or imperfection and to discriminate between one manner and another, they will also be able to perceive how much praise and honour that man deserves who adds upright ways and goodness of life to the excellencies of arts so noble. Kindled by the praise that those so constituted have obtained, they too will aspire to true glory. Nor will little fruit be gathered from the history, true guide and mistress of our actions, in reading of the infinite variety of innumerable accidents that befell the craftsmen, sometimes by their own fault and very often by chance. It remains for me to make excuse for having on occasion used some words of indifferent Tuscan, whereof I do not wish to speak, having ever taken thought to use rather the words and names particular and proper to our arts than the delicate or choice words of precious writers. Let me be allowed, then, to use in their proper speech the words proper to our craftsmen, and let all content themselves with my good will, which has bestirred itself to produce this result not in order to teach to others what I do not know myself, but through a desire to preserve this memory at least of the most celebrated craftsmen, seeing that in so many decades I have not yet been able to see one who has made much record of them. For I have wished with these my rough labours, adumbrating their noble deeds, to repay to them in some measure the debt that I owe to their works, which have been to me as masters for the learning of whatsoever I know, rather than, living in sloth, to be a malignant critic of the works of others, blaming and decrying them as men are often wont to do. But it is now time to come to our business.