The Stones of Venice, Volume 2 (of 3),

by John Ruskin

Now, observe, first, that the relation of the roof-mask to the roof proper, in the Greek type, forms that pediment which gives its most striking character to the temple, and is the principal recipient of its sculptural decoration. The relation of these lines, therefore, is just as important in the Greek as in the Gothic schools.

Fig. XIII.

§ XCI. Secondly, the reader must observe the difference of steepness in the Romanesque and Gothic gables. This is not an unimportant distinction, nor an undecided one. The Romanesque gable does not pass gradually into the more elevated form; there is a great gulf between the two; the whole effect of all Southern architecture being dependent upon the use of the flat gable, and of all Northern upon that of the acute. I need not here dwell upon the difference between the lines of an Italian village, or the flat tops of most Italian towers, and the peaked gables and spires of the North, attaining their most fantastic developement, I believe, in Belgium: but it may be well to state the law of separation, namely, that a Gothic gable must have all its angles acute, and a Romanesque one must have the upper one obtuse: or, to give the reader a simple practical rule, take any gable, a or b, [Fig. XIII.], and strike a semicircle on its base; if its top rises above the semicircle, as at b, it is a Gothic gable; if it falls beneath it, a Romanesque one; but the best forms in each group are those which are distinctly steep, or distinctly low. In the figure f is, perhaps, the average of Romanesque slope, and g of Gothic.

Fig. XIV.

§ XCII. But although we do not find a transition from one school into the other in the slope of the gables, there is often a confusion between the two schools in the association of the gable with the arch below it. It has just been stated that the pure Romanesque condition is the round arch under the low gable, a, [Fig. XIV.], and the pure Gothic condition is the pointed arch under the high gable, b. But in the passage from one style to the other, we sometimes find the two conditions reversed; the pointed arch under a low gable, as d, or the round arch under a high gable, as c. The form d occurs in the tombs of Verona, and c in the doors of Venice.

§ XCIII. We have thus determined the relation of Gothic to the other architectures of the world, as far as regards the main lines of its construction; but there is still one word which needs to be added to our definition of its form, with respect to a part of its decoration, which rises out of that construction. We have seen that the first condition of its form is, that it shall have pointed arches. When Gothic is perfect, therefore, it will follow that the pointed arches must be built in the strongest possible manner.

Fig. XV.

Now, if the reader will look back to [Chapter XI.] of Vol. I., he will find the subject of the masonry of the pointed arch discussed at length, and the conclusion deduced, that of all possible forms of the pointed arch (a certain weight of material being given), that generically represented at e, [Fig. XV.], is the strongest. In fact, the reader can see in a moment that the weakness of the pointed arch is in its flanks, and that by merely thickening them gradually at this point all chance of fracture is removed. Or, perhaps, more simply still:—Suppose a gable built of stone, as at a, and pressed upon from without by a weight in the direction of the arrow, clearly it would be liable to fall in, as at b. To prevent this, we make a pointed arch of it, as at c; and now it cannot fall inwards, but if pressed upon from above may give way outwards, as at d. But at last we build as at e, and now it can neither fall out nor in.

§ XCIV. The forms of arch thus obtained, with a pointed projection called a cusp on each side, must for ever be delightful to the human mind, as being expressive of the utmost strength and permanency obtainable with a given mass of material. But it was not by any such process of reasoning, nor with any reference to laws of construction, that the cusp was originally invented. It is merely the special application to the arch of the great ornamental system of Foliation; or the adaptation of the forms of leafage which has been above insisted upon as the principal characteristic of Gothic Naturalism. This love of foliage was exactly proportioned, in its intensity, to the increase of strength in the Gothic spirit: in the Southern Gothic it is soft leafage that is most loved; in the Northern thorny leafage. And if we take up any Northern illuminated manuscript of the great Gothic time, we shall find every one of its leaf ornaments surrounded by a thorny structure laid round it in gold or in color; sometimes apparently copied faithfully from the prickly developement of the root of the leaf in the thistle, running along the stems and branches exactly as the thistle leaf does along its own stem, and with sharp spines proceeding from the points, as in [Fig. XVI.] At other times, and for the most part in work in the thirteenth century, the golden ground takes the form of pure and severe cusps, sometimes enclosing the leaves, sometimes filling up the forks of the branches (as in the example fig. 1, [Plate I.] Vol. III.), passing imperceptibly from the distinctly vegetable condition (in which it is just as certainly representative of the thorn, as other parts of the design are of the bud, leaf, and fruit) into the crests on the necks, or the membranous sails of the wings, of serpents, dragons, and other grotesques, as in [Fig. XVII.], and into rich and vague fantasies of curvature; among which, however, the pure cusped system of the pointed arch is continually discernible, not accidentally, but designedly indicated, and connecting itself with the literally architectural portions of the design.