Agamemnon; Aphrodite crossing the sea on a swan; the blind Chiron healed by Apollo; the weighing of Cupids--‘young loves for sale;’ and rows of well-sketched warriors, representing the victories of valour, beauty, and honesty over barbaric roughness, dishonesty, and despotism, form the subjects of pictorial ornamentation. What an immense field for the student of art to peruse, to fill his imagination with lively classical scenes! II. The _polychromatic_ style took its origin in the very first attempts in pottery, when white pipe-clay was painted over. The colours used were red, violet, and yellow oxides of iron. At the period when marble was introduced in architecture, and ivory in sculpture, during the middle of the fifth century B.C., we find these highly-coloured and richly-decorated vases. The paste was very fine, originally white, and the colouring encaustic. Not only mineral pigments and metallic oxides, but also vegetable colours, requiring only a very slow fire, were known and used. The encaustic consisted of a polychromatic paste more or less opaque, containing, in addition to wax, also flint, whether as principal or secondary element it is difficult to decide. This polychromatic treatment is to be observed on some smaller vessels, and vases known under the name of Lekythus (with a narrow mouth), and on saucers of large dimensions, the outsides having reddish figures on black grounds, and the insides, coloured figures on white grounds. Pottery led to fashioning in clay, and this to modelling in bronze and sculpture. Architecture took its origin in religion, as also did sculpture. Opposed to the inorganic, objective productions of human intellect, as embodied in architecture, is spirit aspiring to a subjective existence in sculpture. The inorganic sternness of architecture is far surpassed by plastic art, which embodies spirit in a less fixed form. Spirit is not yet absolutely free, for it requires a tangible body to show its existence. Unlike music and painting, which by a mere movement of the air, or a mixture of tints, produce bodies, plastic art has to fill the three dimensions of space, and does this by means of coarse matter--with clay, wood, bronze, or stone. Sculpture stands higher in the scale of art than architecture, for it is not obliged to transform inorganic matter for a utilitarian purpose.