The Doric order was employed for all large temples, since it possessed in fullest measure the qualities of simplicity and dignity, the attributes appropriate to greatness. Quite properly also its formulas were more fixed than those of any other style. The Ionic order, the feminine of which the Doric may be considered the corresponding masculine, was employed for smaller temples; like a woman it was more supple and adaptable than the Doric, its proportions were more slender and graceful, its lines more flowing, and its ornament more delicate and profuse. A freer and more elaborate style than either of these, infinitely various, seeming to obey no law save that of beauty, was used sometimes for small monuments and temples, such as the Tower of the Winds, and the monument of Lysicrates at Athens. [Illustration 1] Because the Greek architect was at liberty to improve upon the work of his predecessors if he could, no temple was just like any other, and they form an ascending scale of excellence, culminating in the Acropolis group. Every detail was considered not only with relation to its position and function, but in regard to its intrinsic beauty as well, so that the merest fragment, detached from the building of which it formed a part, is found worthy of being treasured in our museums for its own sake. Just as every detail of a Greek temple was adjusted to its position and expressed its office, so the building itself was made to fit its site and to show forth its purpose, forming with the surrounding buildings a unit of a larger whole. The Athenian Acropolis is an illustration of this: it is an irregular fortified hill, bearing diverse monuments in various styles, at unequal levels and at different angles with one another, yet the whole arrangement seems as organic and inevitable as the disposition of the features of a face. The Acropolis is an example of the ideal architectural republic wherein each individual contributes to the welfare of all, and at the same time enjoys the utmost personal liberty (Illustration 1). Very different is the spirit bodied forth in the architecture of Imperial Rome. The iron hand of its sovereignty encased within the silken glove of its luxury finds its prototype in buildings which were stupendous crude brute masses of brick and concrete, hidden within a covering of rich marbles and mosaics, wrought in beautiful but often meaningless forms by clever degenerate Greeks. The genius of Rome finds its most characteristic expression, not in temples to the high gods, but rather in those vast and complicated structures--basilicas, amphitheatres, baths--built for the amusement and purely temporal needs of the people.