The other Motive is _Prevention_, which is one of the most usual Foundations of the _Beauty_ of all things, for even as we love the Fashion of the Cloaths which the Courtiers wear, although this mode have no _Positive Beauty_, but only for the Positive Merit of the Persons that wear them; so we are accustomed to love the Proportions of the Members of _Architecture_, rather because of the great Opinion that we have of them that Invented them, than for any _Positive Beauty_ which is found in the Works of the Ancients, where these Proportions are observ'd; for often these Proportions are against Reason; as we may see in the _Thorus_ of the _Ionick Base_, in the _Faces_ of _Architraves_ and _Chambranles_, or _Door-Cases_, with their _Mouldings_, where the Strong is supported by the Weak, and many other things, which Custom only hath made supportable. These Proportions appertain to Three principal Members, which are _Pillars_, _Piedements_, _Chambranles_; the _Pillars_ taken Generically, and as opposite to _Piedements_, and _Chambranles_ or _Door-Cases_, have Three parts, _viz._ The _Pedestal_, the _Pillar_, and the _Ornaments_. Every one of these Parts is likewise divided into Three other Parts, for the _Pedestal_ is composed of the _Basis_, its _Die_ and its _Cornish_; the _Pillar_ Comprehends its _Base_, _Shaft_ and _Capital_. The _Ornaments_ consist in the _Architrave_, _Frise_, and _Corniche_. The _Piedement_ or _Fronton_, has likewise Three Parts, _viz._ The _Tympan_, the _Corniches_, and the _Acroteres_. The _Chambranle_ or _Door-Case_ is composed of two _Pieds-droits_, or _Piers_, and the _Lintel_ which also supports a _Frise_, which has likewise its _Cornich_. The Disposition, Form, and different Proportions of all the Parts make two things, to which all that is Beautiful in Building hath a Relation, which is _Gender_ and _Order_. _Gender_ depends of the Proportion, which is between the thickness of the _Pillars_ and the space betwixt them. _Order_, doth likewise depend in part upon the Proportion which is between the thickness of the _Pillars_, and their height; but we must likewise joyn to this Proportion many other things that appertain to the principal Parts of the _Pillars_, and other Parts which accompany it, such as are the _Gates_, the _Chambranles_, or _Door-Cases_; and other things which are different in different _Orders_. ART. II. _Of the Five sorts of Fabricks_. There are Five sorts of Fabricks; The First is called _Pycnostyle_, viz. where the Pillars are very close one to another, in such a Proportion that there is but from one Pillar to another, the space of a Diameter and half of the Pillar. See the _Fig._ AA. _Tab._ 2. The Second is called _Systile_, viz. where the Pillars seem to be joyned together, are notwithstanding a little more distant one from another than in the _Pycnostile_; for the intercolumniation is two Diameters of the Pillars. [Sidenote: _Lib. 2. Chap. 3._]