There are two points of departure to this later type. There is on the one hand symbolic architecture, and on the other practical necessity and the impulse of purpose to subserve that necessity. In the case of symbolical forms, as we have already had occasion to observe, architectonic purpose is merely an incidental feature, merely an external mode of co-ordination. The dwelling-house, on the contrary, erected as necessity itself, requires posts of wood, or just walls standing up straight with beams, which are laid across them at right angles, and a roofing, and constitutes, the other extreme. There can be no question that the necessity of this real and effective expediency makes its appearance as the result of its own demand. The distinction that may be raised, however, in answer to the question, whether genuine architecture—as we shall shortly have to consider it as the classic art of building—takes its rise solely in this necessity, or is to be deduced from independent and symbolical works, which conducted us of their own accord to buildings devoted to service, is the point in essential dispute.
(α) It is the force of circumstances which brings to the fore forms in architecture which are wholly stamped with a useful purpose, and the abstract deductions of science, such as the rectilinear line, the right angle, and the smooth surface. For in serviceable architecture that which constitutes the real object, is, in its independence, as a statue, or more closely as human individuals, that is community, a people, brought together for objects of general significance, which no longer have as their aim the satisfaction of physical wants, but are such in a religious and political sense. In a special degree the need asserts itself to shape an enclosure for the image, the statue of the gods, or generally for that which is independently placed before us and actually present as sacred. Memnons, Sphinxes, and the like stand up in the open, or in a grove, that is in the external environment of nature. Images of this kind, however, and still more human images of gods, are borrowed from another realm than that of immediate Nature. They belong to the world of imagination, and come into existence through the artistic powers of mankind. The purely natural environment is therefore not sufficient; they require for their external frame a ground and an enclosure, which shall be derived from the same source as their own, in other words, such as are the product of the imagination, and have received their form by means of artistic effort. It is only in an environment created by art that the gods find themselves at home[67]. In such a case, however, this external frame does not possess its object in itself, but it subserves something other than itself, and is subject to the principle of purpose or expediency.
If, however, these, in the first instance, purely serviceable forms are exalted to an expression of beauty they are unable to persist in their original abstract mode, and are forced to accept, in addition to what is merely symmetrical and harmonious, that which is organic, concrete, essentially itself conclusive and varied. And because this is so men are forced to reflect over distinctions of determinating form, no less than the express emphasis to be made on certain aspects of form, which is wholly superfluous where the question is only one of a definite purpose to be attained. A beam, for example, is from one point of view that which is carried forward in a straight line; at the same time, however, it terminates at both extremes. In the same way a post which has to support either rafter or roof stands on the ground and reaches its terminating point where the rafter rests upon it. The architecture of service asserts distinctions of this kind and gives form to them by means of art; an organic design, on the contrary, such as a plant, or a human being, ay, whether we look at such above or below, but in any case throughout, has to be organically embodied, to be differentiated in the latter case consequently by feet and head, or in the former by roots and corona.
(β) Conversely symbolic architecture takes its point of departure more or less from organic forms of this kind, as we see is the case with sphinxes, memnons, and so forth; yet it is also unable wholly to exclude in its walls, doors, beams, obelisks, and the rest, the principle of the straight line and uniformity, and is generally obliged to accept the assistance of such principles appertinent to the genuine art of building as equality of size, interval of relative position, rectilinear progression of rows, in short, order and regularity when it proposes to place in a series and to set up in accordance with architectural design the colossal sculptured figures to which we have referred. By doing so it unites in itself both principles[68], whose union brings for result an architecture, the beauty of which is promoted along with the object to which it is subservient, albeit in the symbolic type these two aspects[69] still lie in separation side by side instead of being fused in unity.
(γ) We may therefore so conceive the transition that on the one side the art of building, hitherto self-subsistent in type, is forced to modify under scientific principles[70] the forms of organisms in the direction of regularity, and to pass into the province of proposed expediency; while conversely what is entirely such intended purpose in the form moves in opposition to the principle of the organic world. Where these two extremes come together, and mutually pass into one another, we get what is really beautiful classic architecture.
We may recognize this union, as it actually arises, clearly in the transformation now introduced of that which we already have met with in the architecture which was anterior under the form of columns. In other words, it is true that from one point of view walls are necessary to make an enclosure; but walls, too, can stand up independent, as we have already proved with examples, without making the enclosure complete, to which a roofing, no less than an enclosure of the sides, essentially contributes. But a roofing of this kind has to be supported. The simplest way of doing this is by columns, whose essential and, at the same time exclusive, rationale consists here in being simply supports. For this reason walls are really a superfluity is so far as it is only a question of support. For supporting is a mechanical relation, and belongs to a province of gravity and its laws. And in this[71] gravity the weight of a particular body is concentrated in its point of gravity, and must be assisted at this centre in remaining horizontal without a fall. This is precisely what the column does, so that with it the power of support appears to be reduced to the minimum limit of exterior means to effect this. What a wall at great cost[72] effects, is equally effected by a few columns. It is a very beautiful characteristic of classic architecture not to set up more columns than are actually necessary to carry the weight of the rafter and that which reposes thereon. In genuine architecture columns, for purposes of mere decoration, are not truly beautiful. For the same reason also columns which stand up entirely alone do not perform their true function. No doubt triumphal columns have been erected, such as the famous ones in honour of Trajan and Napoleon: but these, too, are really but a pedestal for statues, and moreover covered with sculptured reliefs to commemorate and glorify the hero, whose image they carry. In the case of the column, then, it is of exceptional importance to see how in the course of architectural development it is compelled to divest itself of the concrete form of Nature before it can secure its more abstract form, the form, that is, which is as compatible with a definite object as it is with beauty.
(αα) Independent architecture, on account of the fact that it starts with organic images, makes use of human shapes, as, for example, we find in Egypt figures in some measure at least human, such as Memnons and the like, are utilized. This is, however, a mere superfluity, in so far, that is, as a definition of this character is not the true medium of support. We find among the Greeks that Caryatides are used in another mode and under a more severe obedience to rule to support superimposed weight, but such cannot be extensively employed. Moreover, we can only regard it as a misuse of the human form to crush it together under such burdens, and it is for this reason that Caryatides receive the character of the oppressed; their drapery suggests a state of slavery under which it is a degradation to carry such burdens.
(ββ) The more natural organic form for pillars and supports which have to bear a weight is consequently the tree, plant-life generally, a stem, a thin stalk which strives upwards in a vertical direction. The hole of a tree already carries of its own nature its crown of branches, the blade of corn the ear, the stem the flower. These forms, too, the Egyptian art of building, which has not as yet attained the liberty of viewing them in their abstract intension, borrows directly from Nature. In this respect the grandiose quality which we discover in the style of Egyptian palaces or temples—the colossal proportions of its rows of columns, the huge number of them, and withal the imposing mutual relations of the entire structure, has ever filled the spectator with wonder and astonishment. In these colonnades we do not find that all columns have the same form; they alternate between one, two, or three types. Denon, in his work on the Egyptian expedition, has collected a great number of such types. The combined effect is not as yet any uniform shape based on abstract principles of selection; rather the foundation is the shape of an onion, a reed-like efflorescence of leaf from the bulb, or, in other examples, a compression together of the root-leaves according to the manner of several kinds of plant. From this base, then, the thin stem breaks upwards straight, or mounts as column with twisted coils, and the capital is also a separation of leaves from branches which suggests the process of a flower. The imitation, however, is not true to Nature, but the plant-like forms are drained off under the architectural impulse, and made to approximate to circular, geometrical, and regular forms, or straight lines, so that such columns, in their entirety, resemble what are usually described as arabesques.
(γγ) This is not the place to enter into a general discussion of the arabesque for the reason that notionally it marks precisely the transition from the architecture which adopts as its basic form the natural organism to that which by its adoption of a more severe regularity is more strictly architectonic. When, however, the art of building has become free in its definitive character it relegates arabesques to the function of decoration and ornament. They are then pre-eminently forms of plants strained off, so to speak, or forms which originate from plants together with entwined forms of animals and human beings, or forms of animals in their passage over to plant-life. In so far as they purport to authenticate a symbolical significance the transitional passage between the different spheres of the animal kingdom hold good for it. Apart from such an interpretation they are simply the play of the imagination in the selection, combination and articulation of the most diverse forms of Nature. For architectural ornamentation of this kind, in the invention of which the imagination finds scope for its activity in the most varied creations of every kind, not even excluding utensils and drapery, the fundamental determinant and type is this, that whether it be plants, leaves, flowers, or animals, all are made to approximate to the abstract figures of science, in other words the inorganic. For this reason we frequently find arabesques to be stiff, untrue to organic life; and it is on this account that they are not unfrequently condemned and art is blamed for the use of them. This is exceptionally true of painting, though Raphael himself did not scruple to paint arabesques in great profusion, characterized with the highest charm, nobility of feeling, variety, and grace. No doubt arabesques are an antithesis to nature, whether we compare them with organic forms or the rigid laws of mechanics; but an opposition of this kind is not merely a right of art generally, but even an obligation under which architecture is bound. It is only by this means that living forms in other respects unfitted for the art of building are made adaptable to the truly architectural style and brought into harmony with it. Such an adaptability is offered in an exceptionally close degree by vegetable Nature, which is also in the East utilized to an extravagant extent in arabesques; in other words plants are not as yet individual objects which possess feeling, but naturally present themselves as adapted to architectural design, by virtue of the fact that they form coverings and protection against rain, sunlight, and wind, and, generally speaking, do not possess the free oscillation[73] of lines which breaks forth from the regularity of scientific conceptions[74]. Architecturally used the regularity of leaves already present is yet further subjected to rule in the definition of rondure and straight line, so that by this means everything which it is possible to regard as distortion, unnaturalness, or stiffness in the plant-forms is fundamentally to be considered as a transformation adapted to the requirements of what is genuinely architectural.