Isaac Ware's (d. 1766) A Complete Body of Archtecture... of 1756 is not only the most important of his works but also one of the remarkable books during the Neo-classical period in Britain. As a result of looking it over, the present author has drawn has conclusions as follows : Ware's theory of the proportions of orders is not able to be understood simply in the context of the Renaissance tradition, and he has the different point of view of proportion from both that of the Renaissance and that of Perrault's, and therefore, his proposal of the proportions of orders should be regarded as typically English, since he maintains the plural systems of proportion on the basis of feasibility.