The Roman Corinthian, like the Greek orders, consisted of three parts, stylobate, column, and entablature, but the stylobate was much loftier, and was not graduated, except in the access before a portico. The column varied from nine and a half to ten diameters, and was always fluted with twenty-four flutes and fillets. The height of the capital is a diameter and one eighth; the entablature varies from one diameter and seven eighths to two diameters and a half. The portico of the Pantheon is one of the best specimens of the Corinthian order. The entablature of the temple of Jupiter Stator, like that of the Pantheon, is two diameters and one half. The pediments are steeper than those made by the Greeks, varying in inclination from eighteen to twenty-five degrees. The mouldings used in Roman architectural works are the same as the Grecian in general form, although they differ from them in contour. They are less delicate and graceful, but were used in great profusion. Roman architecture is overdone with ornament, every moulding carved, and every straight surface sculptured with foliage or historical subjects in relief. The ornaments of the frieze consist of foliage and animals, with a variety of other things. The great exuberance of ornament is considered a defect, although when applied to some structures it is exceedingly beautiful. In the time of the first Caesars architecture had a character of grandeur and magnificence. Columns and arches appeared in all the leading public buildings, columns generally forming the external, and arches the internal construction. Fabric after fabric arose on the ruins of others. The Flavii supplanted the edifices of Nero, which ministered to debauchery, by structures of public utility.
[Sidenote: Changes made by the Romans.]
[Sidenote: Invention of the arch.]
[Sidenote: Uses of the arch.]
The Romans invented no new principle in architecture, except the arch, which was not known to the Greeks, and carried out by them to greater perfection than by the Romans; but this, for simplicity, harmony, and beauty, has never been surpassed in any age, or by any nation. The Romans were a practical and utilitarian people, and needed for their various structures greater economy of material than large blocks of stone, especially for such as were carried to great altitudes. The arch supplied this want, and is perhaps the greatest invention ever made in architecture. No instance of its adoption occurs in the construction of Greek edifices, before Greece became a part of the Roman Empire. Its application dates back to the Cloaca Maxima, and may have been of Etrurian invention. It was not known to Egyptians, or Persians, or Indians, or Greeks. Some maintain that Archimedes of Sicily was the inventor, but to whomsoever the glory of the invention is due, it is certain that the Romans were the first to make a practical application of its wonderful qualities. It enabled them to rear vast edifices into the air with the humblest materials, to build bridges, aqueducts, sewers, amphitheatres, and triumphal arches, as well as temples and palaces; its merits have never been lost sight of by succeeding generations, and it is at the foundation of the magnificent Gothic cathedrals of the Middle Ages. Its application extends to domes and cupolas, to arched floors and corridors and roofs, and to various other parts of buildings where economy of material and labor is desired. It was applied extensively to doorways and windows, and is an ornament as well as a utility. The most imposing forms of Roman architecture may be traced to a knowledge of the properties of the arch, and as brick was more extensively used than any other material, the arch was invaluable. The imperial palace on Mount Palatine, the Pantheon, except its portico and internal columns, the temples of Peace, of Venus and Rome, and of Minerva Medica, were of brick. So were the great baths of Titus, Caracalla, and Diocletian, the villa of Adrian, the city walls, the villa of Maecenas at Tivoli, and most of the palaces of the nobility; although, like many of the temples, they were faced with stone. The Colosseum was of travertine faced with marble. It was the custom to stucco the surface of the walls, as favorable to decorations. In consequence of this invention, the Romans erected a greater variety of fine structures than either the Greeks or Egyptians, whose public edifices were chiefly confined to temples. The arch entered into almost every structure, public or private, and superseded the use of long stone beams, which were necessary in the Grecian temples, as also of wooden timbers, in the use of which the Romans were not skilled, and which do not really pertain to the art of architecture. An imposing building must always be constructed of stone or brick. The arch also enabled the Romans to economize in the use of costly marbles, of which they were very fond, as well as of other stones. Some of the finest columns were made of Egyptian granite, very highly polished.
The extensive application of the arch doubtless led to the deterioration of the Grecian architecture, since it blended columns with arcades, and thus impaired the harmony which so peculiarly marked the temples of Athens and Corinth. And as taste became vitiated with the decline of the Empire, monstrous combinations took place, which were a great fall from the simplicity of the Parthenon, and the interior of the Pantheon.
[Sidenote: Magnificence of Roman architecture.]
But whatever defects marked the age of Diocletian and Constantine, it can never be questioned that the Romans carried architecture to a perfection rarely attained in our times. They may not have equaled the severe simplicity of their teachers, the Greeks, but they surpassed them in the richness or their decorations, and in all buildings designed for utility, especially in private houses and baths and theatres.
[Sidenote: The effect of columns in architecture.]
The Romans do not seem to have used other than semicircular arches. The Gothic, or Pointed, or Christian architecture, as it has been variously called, was the creation of the Middle Ages, and arose nearly simultaneously in Europe after the first Crusade, so that it would seem to be of Eastern origin. But it was a graft on the old Roman arch,—in the shape of an ellipse rather than a circle. Aside from this invention, to which we are indebted for the most beautiful ecclesiastical structures ever erected, we owe every thing in architecture to the Greeks and Romans. We have found out no new principles which were not equally known to Vitruvius. No one man was the inventor or creator of the wonderful structures which ornamented the cities of the ancient world. We have the names of great architects, who reared various and faultless models, but they all worked upon the same principles. And these can never be subverted. So that in architecture the ancients are our schoolmasters, whose genius we revere the more we are acquainted with their works. What more beautiful than one of those grand temples which the heathen but cultivated Greeks erected to the worship of their unknown gods: the graduated and receding stylobate as a base for the fluted columns, rising at regular distances, in all their severe proportion and matchless harmony, with their richly carved capitals, supporting an entablature of heavy stones, most elaborately moulded and ornamented with the figures of plants and animals, and rising above this, on the ends of the temple, or over a portico several columns deep, the pediment, covered by chiseled cornices, with still richer ornaments rising from the apices and at the feet; all carved in white marble, and then spread over an area larger than any modern churches, making a forest of columns to bear aloft those ponderous beams of stone, without any thing tending to break the continuity of horizontal lines, by which the harmony and simplicity of the whole are seen. So accurately squared and nicely adjusted were the stones and pillars of which these temples were built, that there was scarcely need of even cement. Without noise or confusion or sound of hammers did those temples rise, since all their parts were cut and carved in the distant quarries, and with mathematical precision. And within the cella, nearly concealed by the surrounding columns, were the statues of the gods, and the altars on which incense was offered, or sacrifices made. In every part, interior and exterior, do we see a matchless proportion and beauty, whether in the shaft, or the capital, or the frieze, or the pilaster, or the pediment, or the cornices, or even the mouldings—everywhere grace and harmony, which grow upon the mind the more they are contemplated. The greatest evidence of the matchless creative genius displayed in those architectural wonders is that, after two thousand years, and with all the inventions of Roman and modern artists, no improvement can be made, and those edifices which are the admiration of our own times are deemed beautiful as they approximate the ancient models which will forever remain objects of imitation, No science can make two and two other than four. No art can make a Doric temple different from the Parthenon without departing from the settled principles of beauty and proportion which all ages have endorsed. Such were the Greeks and Romans in an art which is one of the greatest indices of material civilization, and which by them was derived from geometrical forms, or the imitation of Nature.