-CHITECTURE is the art of building v/ell:—the
Architect, he who practices the art, who may be con-
sidered in three views, i. The Sumptuary, who furnishes
the expence of the building, 2. The Projector, who de-
signs the plan. 3. The * Operator, or he who eredts, or
adorns, an edifice,
Architedsure is twofold: one, Civil, which is concerned in
edisices destined to the uses of peace, and its attendants, the
liberal arts, &c. such as churches, palaces, porticos, &c.
The other Military, whose province is fortification and the
construdfion of machines for war. Of the first, beauty is the
chief objeds ; of the second, security; of both, conveniency.
Of this Science, then, there are two divisions, of which in
the following books it is my purpose to treat; and I shall en-
deavour to instrudt the projedting Architedf as briessy and
clearly as I can of whom I do not demand, as Vitruvius does,
a knowledge of all sciences, but Ihould wish him to under-
Hand mathematics and design, I Ihould be glad if he followed
* Vitruvius calls him Officinator or Superintendent. Surveyor in Englilh.
* A this