But when freedom ceased to preside over the public fortunes of Greece, grandeur and beauty withdrew from her private minds. As Philip of Macedon drew near, the propitious gods of Olympia migrated to Pella, and all the fair heritage assumed a sickly hue in the deepening shade. As rhetoric vainly mimicked the deep thunders of eloquence which had passed, and metaphysical sophistry was substituted for that lofty philosophy which had guided honorable destinies, so the grand taste which at first dictated to art the monumental style, degenerated into mere prettiness, or expanded into the heaviness of an unhealthy growth. But soon even the portion which yet retained some elegance ceased altogether, and what remained was rapidly transformed into the type of an age already gaining the ascendancy--colossal might. Phidias excelled in graphic as in plastic art. According to Pliny, his Medusa's head was a wonderful picture. Alcamenes, the Athenian, continued for a while the style of that great master, as did Agoracritus and Scopas of Paros. But the latter, like Lysippus, were transitional to Praxiteles of Cnidos, in whom great art expired. Original genius ceased to produce models of its own, and only expert imitators of mighty predecessors succeeded. Pamphilus was the Perugino, and Zeuxis, of Crotona, the Raphael, of Periclean painters. Apelles seems to have been the Titian of his age, and Protogenes, of Rhodes, a Greek Leonardo, whose picture of Temperance, his cotemporary Apelles declared, was worthy of being carried to heaven by the Graces. But with these masters pictorial art declined, and, like architectural and plastic art, was marked with the grossness of a coming age.