De re aedificatoria (On the Art of Building) is a classic architectural treatise written by Leon Battista Alberti between 1443 and 1452.De re aedificatoria is subdivided into ten books and includes: In his survey of desirable floor plans for sacred buildings – "temples" in his phrase—Alberti begins with the ideal form of the circle, which is expressed in numerous examples of Nature.Chapels add small geometric figures to the basic circles and polygons to give a great variety of floor plans, in which each geometrical figure retains its clear unity and simple ratios that bind all elements of the plans and elevations into a harmonic unity.In Book Nine, Alberti presents his comments about aesthetic theory and beauty which Borsi summarizes on page 234 of his Alberti book stating: "In short, what are the elements that constitute beauty?Quoting Alberti, Borsi presents Alberti as stating: "For whatever that property be which is chosen from the whole number and nature of the several parts or attributed to each of them in precise and equal measure, or which must be such as to form a single entity of organism out of a number of parts, binding them together in a just, stable and harmonious manner... it must certainly contain within itself the value, I would almost say the essence of all the above-mentioned parts with which it is connected or which it compenetrates.
Title page of 1550 edition, Florence
Plate from a 1565 edition, showing the plan of a
basilica