In portraiture, the Roman sculpture developed far more speciality and meaning. The early tendency of ancient Italian art towards the individual has already been described, and it may easily be understood that, in the line of portraiture, this had an important influence, even after Hellenic art had completely established itself upon the Tiber. In this province it best served its purpose. Still, it is evident that the vacant, external individualization peculiar to the primitive works of Etruria and Rome, such as the wax masks of their ancestors, required improvement by greater expression of life and character, for which Lysippos, in portrait-sculpture, had so decidedly opened the way. By the combination of these two elements, the portraits became the most successful works of Roman sculpture. The Hellenic tendency to idealize prevailed in those statues which presented the person heroically—as Achilles, for instance—or were rendered divine by attributes of Zeus, or Apollo, Juno, Ceres, Venus, and others. The figure was then usually nude, and was only so far imitated from life as to give to the head the true features, with a certain transfiguration. This treatment, exemplified in many of the statues of Antinous, had prevailed in Hellenic art since the time of Lysippos, the great master of portrait-sculpture. The native Italian tendency, on the contrary, had sway in the so-called “iconic” statues; in those, namely, in which the personal and human character was carried out. In these the clothing was given with more detail and significance; as, for example, in the figures of the emperors wearing the toga (statuæ togatæ), or the presidents of the senate. Others are represented as high-priests, with the drapery drawn over the back of the head; others (statuæ thoracatæ) as field-officers, in coats of mail, as, among many examples, in the celebrated Augustus of the Vatican, found, in 1863, before the Porta del Popolo. (Fig. 300.) In these the action generally chosen seems to have been that of address to the senate or to the army. Equestrian statues belonged chiefly to the thoracatæ, though they appear also in conception like Achilles, nude, or clothed only with the himation. As they were all of bronze, few remain; so that the Marcus Aurelius upon the Capitoline, notwithstanding its hardness and other faults, is the most celebrated, and has become the standard for countless modern statues. The figures upon chariots, on the contrary, and especially those which ornamented the triumphal arches, were, for the most part, togatæ. The mention of triumphal groups with six pairs of horses, or of elephants, shows to what extreme of tastelessness Roman art had become debased in the time of the emperors. The better works of this class are most suitably represented by the four bronze horses, falsely ascribed to Lysippos, which were brought by the Venetians from Constantinople in 1204, and which have been placed over the portal of St. Mark’s Church in Venice. Iconic female statues are distinguished by careful imitation of garments falling in rich folds, and, even in the early times, by exaggerated head-dresses, which gave them the appearance of fashion-plates. Noble ladies, sitting comfortably, and with dignity, in arm-chairs, are among the most successful of Roman works. Yet there is in all these portrait-statues, especially in the usual oratorical gestures, a typical character as little to be mistaken as is the softening influence of Hellenic idealism in most of the heads. Without injuring the individuality, it increases the beauty and heroic elevation of the entire figure. Not unfrequently, however, instead of inner significance, we find merely richness of drapery and detailed accessories, particularly in reliefs upon coats of mail, etc.
The same combination of native Italian tendency with Hellenic enlightenment, found in portrait-sculpture, is shown in the reliefs which thereby became specifically Roman. These appear to have been very numerous, as it pleased this people to leave few vacant surfaces upon their monuments, which were not only ornamented, but literally covered with reliefs and inscriptions. Thus sculpture became as much a written chronicle as a decoration. In limited spaces, such as pedestals and capitals, and the key-stones of arches, it became merely ornamental; the subjects of the ornamentation, in keeping with the style, being chiefly allegorical, such as Victories bearing trophies, the Seasons, etc. Upon large surfaces sculpture completely took the nature of chronicles and inscriptions, and thus were developed the truly Roman historical reliefs in connection with inscriptions.
These, in accordance with the Italian view of art in general, rested almost entirely upon a realistic foundation. Mythology disappeared, and allegory alone still exercised a small influence; as, for example, the Genius of Immortality bearing upward a deified emperor, Roma with the triumphal quadriga, Victory upon a shield perpetuating the memory of conquest; while personifications of cities or rivers, and even of swamps, indicated the locality of the action, or Jupiter Pluvius signified the coming of the saving rain. After the Antonines, the events are related with simple truth to nature, as a mere chronicle, without any idealization at all. The subjects of Roman reliefs are distinguished from the Grecian only by the Greeks having substituted, whenever possible, mythological for human or common events; and there was no less difference in the artistic treatment. The Greek never lost sight of that conventional law in sculptural reliefs by which the figures are conceived in a situation to give the most pleasing outline. The whole procession of persons, one behind the other, excluding all effect of foreshortening and perspective, was displayed upon a surface, and developed, so far as the figure would permit, in harmonious unity, and, whether represented sitting on horseback, or on foot, occupying the same space in regard to height and in regard to the depth of relief. It resulted that the design was arranged in reference to two planes only—the original surface of the stone, which disappeared with the work (except in the highest points), and the common background. Roman sculpture, on the other hand, freed itself from all such laws of style. The profile position no longer predominated, and the figures in the mutilated remnants, where the details are lost, appear like formless masses, which, in the Hellenic system, would have been impossible. The outline loses its significance, and the figures are arranged with such disregard of the surface upon which they are placed that they rather resemble portions of statues. The projection from the background also varies, many parts, particularly the head and arms, standing entirely disengaged. In the arrangement of several figures, one behind another, against a landscape or architectural background, an attempt was made to distinguish the forms in front from those behind by higher or lower relief, with something of the effect of perspective. (Fig. 302.) From this ensued a confusion of lines and a want of clearness, atmospheric effect not assisting in sculpture, as in painting, to separate the farther object from the nearer, and thus to define the distance. This crowding was still more objectionable when, besides being grouped one behind another, the figures were placed one over another, representing the scene as if from a bird’s-eye view.
It thus happened that Roman sculpture in relief was characterized rather by a realistic and picturesque tendency than by well-conventionalized composition. But the forms remained Hellenic, at least so far as the circumstances represented in Grecian examples would permit. When, however, a river was to be represented, for which the Greeks always placed a local deity as symbol, or when the besieging of towns, castles, or bridges was given, the Romans approached more nearly to the conception of Oriental nations. As the subject was of more importance than the composition, the deed than the artistic illustration, a certain common and formal correctness sufficed—an artistic handwriting, so to speak, which might be easily read. Their work might be termed an unconscious translation from the Assyrian or Egyptian into the Roman language.