Aratra Pentelici, Seven Lectures on the Elements of Sculpture / Given before the University of Oxford in Michaelmas Term, 1870

by John Ruskin

In a very interesting essay on the architecture of the Parthenon, by the Professor of Architecture of the École Polytechnique, M. Émile Boutmy, you will find it noticed that the Greeks do not usually weaken, by carving, the constructive masses of their building; but put their chief sculpture in the empty spaces between the triglyphs, or beneath the roof. This is true; but in so doing, they merely build their panel instead of carving it; they accept, no less than the Goths, the laws of recess and limitation, as being vital to the safety and dignity of their design; and their noblest recumbent statues are, constructively, the fillings of the acute extremity of a panel in the form of an obtusely summited triangle.

167. In gradual descent from that severest type, you will find that an immense quantity of sculpture of all times and styles may be generally embraced under the notion of a mass hewn out of, or, at least, placed in, a panel or recess, deepening, it may be, into a niche; the sculpture being always designed with reference to its position in such recess: and, therefore, to the effect of the building out of which the recess is hewn.

But, for the sake of simplifying our inquiry, I will at first suppose no surrounding protective ledge to exist, and that the area of stone we have to deal with is simply a flat slab, extant from a flat surface depressed all round it.

168. A flat slab, observe. The flatness of surface is essential to the problem of bas-relief. The lateral limit of the panel may, or may not, be required; but the vertical limit of surface must be expressed; and the art of bas-relief is to give the effect of true form on that condition. For observe, if nothing more were needed than to make first a cast of a solid form, then cut it in half, and apply the half of it to the flat surface;—if, for instance, to carve a bas-relief of an apple, all I had to do was to cut my sculpture of the whole apple in half, and pin it to the wall, any ordinarily trained sculptor, or even a mechanical workman, could produce bas-relief; but the business is to carve a round thing out of a flat thing; to carve an apple out of a biscuit!—to conquer, as a subtle Florentine has here conquered,[33] his marble, so as not only to get motion into what is most rigidly fixed, but to get boundlessness into what is most narrowly bounded; and carve Madonna and Child, rolling clouds, flying angels, and space of heavenly air behind all, out of a film of stone not the third of an inch thick where it is thickest.

169. Carried, however, to such a degree of subtlety as this, and with so ambitious and extravagant aim, bas-relief becomes a tour-de-force; and, you know, I have just told you all tours-de-force are wrong. The true law of bas-relief is to begin with a depth of incision proportioned justly to the distance of the observer and the character of the subject, and out of that rationally determined depth, neither increased for ostentation of effect, nor diminished for ostentation of skill, to do the utmost that will be easily visible to an observer, supposing him to give an average human amount of attention, but not to peer into, or critically scrutinize, the work.

170. I cannot arrest you to-day by the statement of any of the laws of sight and distance which determine the proper depth of bas-relief. Suppose that depth fixed; then observe what a pretty problem, or, rather, continually varying cluster of problems, will be offered to us. You might, at first, imagine that, given what we may call our scale of solidity, or scale of depth, the diminution from nature would be in regular proportion, as, for instance, if the real depth of your subject be, suppose, a foot, and the depth of your bas-relief an inch, then the parts of the real subject which were six inches round the side of it would be carved, you might imagine, at the depth of half an inch, and so the whole thing mechanically reduced to scale. But not a bit of it. Here is a Greek bas-relief of a chariot with two horses (upper figure, Plate XXI.) Your whole subject has therefore the depth of two horses side by side, say six or eight feet. Your bas-relief has, on this scale,[34] say the depth of a third of an inch. Now, if you gave only the sixth of an inch for the depth of the off horse, and, dividing him again, only the twelfth of an inch for that of each foreleg, you would make him look a mile away from the other, and his own forelegs a mile apart. Actually, the Greek has made the near leg of the off horse project much beyond the off leg of the near horse; and has put nearly the whole depth and power of his relief into the breast of the off horse, while for the whole distance from the head of the nearest to the neck of the other, he has allowed himself only a shallow line; knowing that, if he deepened that, he would give the nearest horse the look of having a thick nose; whereas, by keeping that line down, he has not only made the head itself more delicate, but detached it from the other by giving no cast shadow, and left the shadow below to serve for thickness of breast, cutting it as sharp down as he possibly can, to make it bolder.

171. Here is a fine piece of business we have got into!—even supposing that all this selection and adaptation were to be contrived under constant laws, and related only to the expression of given forms. But the Greek sculptor, all this while, is not only debating and deciding how to show what he wants, but, much more, debating and deciding what, as he can't show everything, he will choose to show at all. Thus, being himself interested, and supposing that you will be, in the manner of the driving, he takes great pains to carve the reins, to show you where they are knotted, and how they are fastened round the driver's waist, (you recollect how Hippolytus was lost by doing that); but he does not care the least bit about the chariot, and having rather more geometry than he likes in the cross and circle of one wheel of it, entirely omits the other!

172. I think you must see by this time that the sculptor's is not quite a trade which you can teach like brickmaking; nor its produce an article of which you can supply any quantity 'demanded' for the next railroad waiting-room. It may perhaps, indeed, seem to you that, in the difficulties thus presented by it, bas-relief involves more direct exertion of intellect than finished solid sculpture. It is not so, however. The questions involved by bas-relief are of a more curious and amusing kind, requiring great variety of expedients; though none except such as a true workmanly instinct delights in inventing, and invents easily; but design in solid sculpture involves considerations of weight in mass, of balance, of perspective and opposition, in projecting forms, and of restraint for those which must not project, such as none but the greatest masters have ever completely solved; and they, not always; the difficulty of arranging the composition so as to be agreeable from points of view on all sides of it, being, itself, arduous enough.

173. Thus far, I have been speaking only of the laws of structure relating to the projection of the mass which becomes itself the sculpture. Another most interesting group of constructive laws governs its relation to the line that contains or defines it.

In your Standard Series I have placed a photograph of the south transept of Rouen Cathedral. Strictly speaking, all standards of Gothic are of the thirteenth century; but, in the fourteenth, certain qualities of richness are obtained by the diminution of restraint; out of which we must choose what is best in their kinds. The pedestals of the statues which once occupied the lateral recesses are, as you see, covered with groups of figures, inclosed each in a quatrefoil panel; the spaces between this panel and the inclosing square being filled with sculptures of animals.