The Ten Books on Architecture

no work can be rightly done without honesty and incorruptibility.

By means of optics, again, the light in buildings can be drawn from fixed quarters of the sky.

he must have a knowledge of drawing so that he can readily make sketches to show the appearance of the work which he proposes.

An architect ought to be an educated man

Let him be educated, skilful with the pencil, instructed in geometry, know much history, have followed the philosophers with attention, understand music, have some knowledge of medicine, know the opinions of the jurists, and be acquainted with astronomy and the theory of the heavens.

in the following books I have disclosed all the principles of the art