Vitruvius — Roman Author

Marcus Vitruvius Pollio, commonly known as Vitruvius, was a Roman author, architect, civil engineer and military engineer during the 1st century BC, known for his multi-volume work entitled De architectura... (wikipedia)

Nothing requires the architect's care more than the due proportions of buildings.
Consistency is found in that work whose whole and detail are suitable to the occasion. It arises from circumstance, custom, and nature.
Proportion is that agreeable harmony between the several parts of a building, which is the result of a just and regular agreement of them with each other; the height to the width, this to the length, and each of these to the whole.
Architecture is a science arising out of many other sciences, and adorned with much and varied learning; by the help of which a judgment is formed of those works which are the result of other arts.
Beauty is produced by the pleasing appearance and good taste of the whole, and by the dimensions of all the parts being duly proportioned to each other.