Symmetry is harmonious compliance among the members of the work itself and correlation between the parts and the whole general figure based on a selected piece as standard. In the human body, there is a balanced symmetrical property from the forearm, foot, palm, finger, and other small elements; so it is with the buildings. For example, in the sacred edifices, symmetry is designed from the thickness of a column or from the module of triglyphs, as in a ballista from the hole what Greeks call the περίτρητος, as in a ship from the space in between each thole pin (διάπηγμα); in every other work, there is a system of symmetry calculated from a component.
Marcus Vitruvius Pollio – De Architectura (translation in English ©J-W.HWANG)





