Roman Mosaics; Or, Studies in Rome and Its Neighbourhood

by Hugh Macmillan

More extensively employed in Greek and Roman statuary and architecture was the Marmor Pentelicum, or Marmo Greco fino of the modern Italians. The quarries which yielded inexhaustible materials for the public buildings and statues of Greece, and for the great monuments of Rome, were situated on the slopes of Mount Pentelicus, near Athens; and after having been closed for ages, have recently been reopened for the restoration of some of the buildings in the Greek capital. The marble is dazzlingly white and fine-grained, but it sometimes contains little pieces of quartz or flint, which give some trouble to the workmen. The Parthenon, crowning like a perfect capital of human art the summit of Nature's rough workmanship in the Acropolis, was built of this marble; and the immortal sculpture of Pheidias on the metopes, the frieze of the cella, and the tympana of the pediments of the temple, known as the Elgin Marbles, were carved out of a material worthy of their incomparable beauty. Innumerable specimens at one time existed in Rome. The arch of Septimius Severus and the Arch of Titus are built of it, although the rusty and weather-beaten hue of these venerable monuments hides the nature of the material. Domitian, who restored the celebrated Temple of Jupiter on the Capitol, procured columns of Pentelic marble for the purpose from Athens; two of these are now in the nave of the church of Ara Coeli, built upon the site of the temple; and portions of the others, and of the marble decorations, were presented by the magistrates to the Franciscan friars of the neighbouring convent, and by them were wrought in 1348 into the conspicuous staircase leading to the façade of the church, which pious Catholics used to mount on their knees in the manner of the ancient worshippers of Jupiter. Among the statues wrought of this marble may be mentioned the famous group of the Laocoon found in the Baths of Titus; the beautiful Venus de Medici, discovered in the Villa of Hadrian, near Tivoli, and now in the Uffizi Gallery in Florence; and the well-known "Farnese Bull," sculptured out of a single block of huge dimensions, unearthed out of the ruins of the Baths of Caracalla, and now in the Museum of Naples. Massimo d'Azeglio, in his Recollections, gives an interesting instance of the value set upon this marble by modern Roman sculptors. Pacetti having purchased an ancient Greek statue of the best period in Pentelic marble, greatly mutilated, and wishing to repair it, could find nothing among the best products of the Carrara quarries to match the marble in purity and fineness of texture, and was therefore obliged to destroy another Greek statue of inferior merit in order to get materials for the restoration. From this combination he succeeded in producing the sleeping figure known as the Barberini Faun, whose forcible abduction by the Pontifical Government on the eve of its being sold to a German prince, so preyed upon the mind of the cruelly-wronged sculptor, that he took to his bed and died.

Very like Pentelic marble, but easily distinguishable, is the Marmor Porinum, the Marmo Grechetto duro of the Italians. It is intermediate in the quality of its grain between Parian and Pentelic marble, being finer than the former and not so fine as the latter. The column in front of the Church of Santa Maria Maggiore, removed by Paul V. in 1614 from the Basilica of Constantine, is composed of this species; as well as the celebrated Torso Belvedere of the Vatican, found near the site of the Theatre of Pompey, to which Michael Angelo traced much of his inspiration, and which, as we learn from a Greek Inscription at the base, was the work of the Rhodian sculptor Apollonios, who carved the group of the "Farnese Bull."

Not unlike this Porine marble was the Marmor Hymettium of the ancients; but it was never a great favourite in Rome on account of its large grain and dingy white colour, slightly tinged with green and marked by long parallel dark gray veins of unequal breadth. The metamorphic action was not sufficiently energetic to destroy the last traces of organic matter and the original stratification of the rock; and the crystallising force was not sufficiently exercised to allow of the entire rearrangement of the whole of the particles so as to expel the included impurities. This marble was not therefore fitted for sculpture; but it could be used for certain architectural purposes and for ornamentation. It used to be quarried extensively on Hymettus, the well-known mountain of Attica, celebrated for the quantity and excellence of its honey. The rock on which the aromatic flowers grew in such profusion for the bees, did not, however, partake of the same delightful quality. In working it a peculiar fetid odour of sulphuretted hydrogen, somewhat like that of a stale onion, was emitted, which gave rise to its modern Italian name—Marmo Cipolla. This repulsive quality, however, disappeared quickly on exposure. The finest specimens of this marble in Rome are the forty-six columns in the Church of St. Paul's, outside the gate, which belonged originally to the Basilica Æmilia in the Forum, founded about forty-five years before Christ, and were transferred to the new building when the venerable old church, in which they had stood for fifteen hundred years, was destroyed by fire. Nothing too can be finer than the two rows of Ionic columns of Hymettian marble which divide the immense nave of Santa Maria Maggiore from the side aisles. There are eighteen on either side, each upwards of eight feet in circumference, and are supposed to have been taken from the Temple of Juno Lucina, whose site is assigned by antiquaries to the immediate vicinity. Similar rows of fluted Doric columns of the same marble, ten on each side, adorn the Church of St. Pietro in Vincoli. They are ancient, and belonged to some temple or basilica of the Forum. There are also five ancient pillars of Hymettian marble in the upper Church of San Clemente, taken from the same prolific source. The wall which surrounds the unique choir or presbytery of this most interesting old church is also composed of great slabs of Hymettian marble, taken from the original subterranean church and hastily put together. Some of the ancient pillars of Hymettian marble belonging to the peristyle of the temple of Ceres and Proserpine, still as widely spaced as they used to be, adorn the Church of Santa Maria in Cosmedin, built on the foundation of that shrine; while twenty-four remarkably fine fluted Corinthian columns of the same material divide the triple nave of Santa Sabina on the Aventine, and are supposed to have belonged to the ancient Temple of Juno Regina, erected by Camillus after the destruction of the Etruscan city of Veii. Hymettian marble was one of the first—if not actually the first—species introduced into Rome. In the year of Rome 662, Lucius Crassus the orator brought to the city six columns of it, each twelve feet in height, with which he adorned his house on the Palatine Hill, receiving, on account of this circumstance, from Marcus Brutus the nickname of the Palatine Venus. At the present day the marble is used for corner-stones in the ordinary houses of Athens.

Another livid white marble, somewhat resembling the Hymettian, is that which is known to the Italians as Marmo Greco livido. It was called by the ancients Marmor Thasium, from Thasos, now Thapso, an island in the north of the Ægean Sea, off the coast of Thrace. The marble dug from the rocky sides of Mount Ipsario—a romantic hill thickly covered with fir trees, and rising three thousand four hundred and twenty-eight feet above the sea—enjoyed considerable reputation among the ancients. In Rome it must have been very common, if the name of Thasian is to be given to all the fragments of nondescript dusky white marble which are found among the ruins. Seneca says that the fish-ponds in his day were formed of that Thasian marble, with which at one time it was rare to adorn even temples. It was considered the least valuable of the white Greek marbles, and was used for the more ordinary purposes; Statius mentioning, in order to show the surpassing splendour of a particular building, that Thasian marble was not admitted into it. But there are not many well-defined monuments of it remaining in Rome. The chief are the bust of Euripides in the Vatican, and the outside casing of the pyramid of Caius Cestius, near the Protestant cemetery, now so weather-beaten and stained with dusky lichens that it is difficult to identify the material of which it is composed.

From this marble, by a slight tinge of yellow and a little darker shade, the livid white marble of Lesbos, the Marmor Lesbium, or Marmo Greco Giallognolo, may be distinguished. It is not a beautiful material; and yet, strange to say, the statues of some of the most beautiful women of antiquity, such as those of Julia Pia in the Vatican, and of the Capitoline Venus in the Museum of the Capitol, were made of this marble, obtained from the birthplace of Sappho. More beautiful is the kind known as the Marmor Tyrium, or the Greco-Turchinicchio, which has a light bluish tinge. It was shipped by the ancients at the port of Tyre from some unknown quarry in Mount Lebanon, which supplied the marble used without stint in the building and decoration of Solomon's Temple and Palace. In this quarry every block was shaped and polished before it was sent to be inserted in its place in the Temple wall, which therefore, as Heber beautifully says, sprang up like some tall palm in majestic silence. In Rome this marble was very rare. The doors in the great piers which support the dome of St. Peter's are each flanked by a pair of spirally-fluted columns of Tyrian marble, supposed to have been brought to Rome by Titus from the Temple of Jerusalem. They originally decorated the confessional of the old Basilica. The twenty-eight steps of the Scala Santa at the Lateran, said by ecclesiastical tradition to have belonged to Pilate's house in Jerusalem, and to have been the identical ones which our Saviour descended when He left the judgment-hall, are made of this marble; so that, whatever we may think of the tradition itself, there is a feature of verisimilitude in the material.

The chief supply of pure white marble in Rome was derived from the quarries in the mountains at Luna, an old Etruscan town near the Bay of Spezia, which fell to decay under the later Roman emperors. This ancient Marmor Lunense is called by the Italians Marmo di Carrara, because it is identical with the famous modern Carrara marble, and belongs to the same range of strata; the ruins of the ancient Luna being only a few miles from the flourishing town of Carrara, the metropolis of the marble trade. From Parian and Pentelic marble, Lunar marble, as already mentioned, can be easily distinguished by the less brilliant sparkle of its crystal facets, as shown by a fresh surface, and also by its more soapy-white colour. It is simply an ordinary Jurassic limestone altered by subsequent metamorphic action. The mountains which contain the quarries are highly picturesque, rising with serried outline to a height of upwards of five thousand feet, their flanks scarred by deep gorges and torrent-beds, and their lower slopes clothed with olive groves, vineyards, and forest trees. Lunar marble was first brought to Rome in the time of Julius Cæsar; and Mamurra, so bitterly reviled by Catullus, the commander of the artificers in Cæsar's army in Gaul, lined with great slabs of this marble the outside and inside of his house on the Coelian Hill—the first recorded instance of veneering or incrusting walls with marble. The discovery of this method of cutting marble into thin slices, and decorating structures of ordinary materials with them, was stigmatised by Pliny as an unreasonable mode of extending luxury. The use of Lunar marble, on account of its easy accessibility, speedily extended to every kind of building, public and private. So vast were the quantities sent to Rome, that Ovid expressed his fear lest the mountains themselves should disappear through the digging out of this marble; and Pliny anticipated that dreadful consequences would be produced by the removal in this way of the great barriers erected by Nature.

Many fine specimens still survive the ravages of ages, among which may be mentioned the eleven massive Corinthian columns, upwards of forty-two feet high, and four and a half feet in diameter, which form the peristyle of the Temple of Neptune in the Piazza di Pietra, well known as the old Custom-house. These pillars suffered severely from the action of fire, and are much worn and defaced, but there is a grandeur about them still which deeply impresses the spectator; and the blocks of marble which form the inner part of the architrave and entablature, as seen from the inner side of the court, are so stupendous that the ruins "overhang like a beetling rock of marble on a mountain peak." Grander still is the majestic column of Lunar marble dedicated to Marcus Aurelius, in the Piazza Colonna, which rears aloft its shaft one hundred and twenty-two feet in the air, wreathed around with spiral bands of historic reliefs, illustrating the Roman conquests over the German tribes north of the Danube. Very splendid specimens of the same marble may be seen in the three fluted Corinthian columns and a pilaster belonging to the Temple of Mars Ultor erected by Augustus in his Forum after the battle of Actium, which are the largest columns of any kind of marble in Rome, being eighteen feet in circumference, and upwards of fifty-four feet high. The two well-known pillars of the portico of the Temple of Minerva, called Le Colonnacce, belonging to the adjoining Forum of Nerva, are also composed of the same material; as also the three deeply-fluted Corinthian columns that remain of the Temple of Vespasian in the Roman Forum, which still retain some traces of the purple colour with which they appear to have been painted. By far the largest single masses of Lunar marble are the two portions of a gigantic frieze and entablature, highly ornamented with sculpture, one measuring one thousand four hundred and ninety cubic feet, and weighing upwards of one hundred tons, lying in the Colonna gardens on the slope of the Quirinal. These relics are supposed to have belonged to the splendid Temple of the Sun, which Aurelian erected after the conquest of Palmyra, and in which he deposited the rich spoils of that city. They are associated therefore with romantic memories of the famous Queen Zenobia, who spent her last days near Tivoli, after having been led captive in fetters of gold to grace the triumphal procession of her conqueror.

For statuary purposes Lunar marble was extensively used in ancient Rome. It formed the material out of which the sculptor produced some of the noblest creations of his genius. Of these the Apollo Belvedere in the Vatican collection is one of the most remarkable. The evidence of its own material, as already mentioned, has dispelled the old idea that it is one of the masterpieces of the Greek school; and Canova's conjecture, based upon some peculiarities of its drapery, is in all likelihood true, viz. that it was a copy of a bronze original, made, probably at the order of Nero, for one of the baths of the imperial villa at Antium, in whose ruins it was found in the fifteenth century. From the time of the Romans, the white marble of the Montes Lunenses has been used for decorative purposes in many of the churches and public buildings of Italy. It formed the material out of which Michael Angelo, Canova, and Thorwaldsen chiselled their immortal works. Its quality and composition, however, vary very considerably, and small crystals of perfectly limpid quartz, called Carrara diamonds, and iron pyrites, occasionally occur, to the annoyance of the sculptor. It becomes soon discoloured when exposed even to the pure air of Italy, but it is capable of resisting decay for very long periods. The opinion current in Paris, that the marbles of Carrara are unable to withstand the effects of the climate of that city, is due to the frequent use of inferior qualities, which are known to artists as Saloni and Ravaccioni, and whose particles have but a feeble cohesion, and consequently slight durability.