No matter how heterogeneous, on the mechanical side, may be the craft involved in all this decoration, and no matter what a variety of artists may be required, still the judgement of taste, so far as it is one upon what is beautiful in this art, is determined in one and the same way: namely, as a judgement only upon the forms (without regard to any end) as they present themselves to the eye, singly or in combination, according to their effect upon the imagination.