Roman Mosaics; Or, Studies in Rome and Its Neighbourhood

by Hugh Macmillan

No spot on earth has a grander name or a more imposing history than the Roman Forum. Its origin takes us far back to geological ages—to a period modern indeed in the inarticulate annals of the earth, but compared with which even those great periods which mark the rise and fall of empires are but as the running of the sands in an hour-glass. It opens up a wonderful chapter in the earth's stony book. Everywhere on the site and in the neighbourhood of Rome striking indications of ancient volcanoes abound. The whole region is as certainly of igneous origin, and was the centre of as violent fiery action, as the vicinity of Naples. The volcanic energy of Italy seems to have begun first in this district, and when exhausted there, to have passed gradually to the south, where Vesuvius, Etna, and Stromboli witness to the great furnace that is still burning fiercely under the beautiful land. No spectacle could have been more sublime than that which the Roman Campagna presented at this period, when no less than ten volcanoes were in full or intermittent action, and poured their clouds of smoke and flame into the lurid sky all around the horizon. Up to the foot of the mountains the sea covered the vast plain; and the action of these waves of fire and steaming floods forms a natural epic of the grandest order. Prodigious quantities of ashes and cinders were discharged from the craters; and these, deposited and hardened by long pressure under water, formed the reddish-brown earthy rock called tufa, of which the seven hills of Rome are composed.

When the sea retired, or rather when the land rose suddenly or gradually, and the volcanoes became extinct, the streams which descended from the mountains and watered the recovered land spread themselves out in numerous fresh-water lakes, which stood an hundred and fifty feet higher than the present bed of the Tiber. In these lakes were formed two kinds of fresh-water strata—the first composed of sand and marl; and the second, where mineral springs gushed forth through the volcanic rock, of travertine—a peculiar reddish-brown or yellow calcareous rock, of which St. Peter's and many of the buildings of modern Rome are composed. We find lacustrine marls on the sides of the Esquiline Hill where it slopes down into the Forum, and fresh-water bivalve and univalve shells in the ground under the equestrian statue of Marcus Aurelius on the Capitol; while on the face of the Aventine Hill, overhanging the Tiber at a height of ninety feet, is a cliff of travertine, which is half a mile long. The lakes which formed these deposits must have covered their sites for many ages. At last, by some new change of level, the lakes retired, and the Tiber scooped out for itself its present channel to the sea.

When man came upon the scene we have no definite information; but numerous flints and stone-weapons have been found among the black pumice breccias of the Campagna mixed with remains of the primitive bison, the elephant, and the rhinoceros. Human eyes must therefore have gazed upon the volcanoes of the Roman plain. Human beings, occupying the outposts of the Sabine Hills, must have seen that plain broken up by the sea into a complicated archipelago, and beheld in the very act of formation that wonderful region destined long ages afterwards to be the scene of some of the greatest events in human history. The Alban Hills, whose present quiet beauty, adorned with white gem-like towns, and softened with the purple hues of heaven, strikes every visitor with admiration, were active volcanoes pouring streams of lava down into the plain even after the foundation of the Eternal City. Livy mentions that under the third king of Rome, a shower of stones, accompanied by a loud noise, was thrown up from the Alban Mount—a prodigy which gave rise to a nine days' festival annually celebrated long after by the people of Latium. The remarkable funereal urns found buried under a bed of volcanic matter between Marino and Castel Gandolfo on the Alban Hills are an incontrovertible proof that showers of volcanic ashes must have been ejected from the neighbouring volcano when the country was inhabited by human beings; nay, when the inhabitants were far advanced in civilisation, for among the objects contained in the funereal urns were implements of writing. At the close of the skirmish between the Romans and Etruscans, near Albano, in which Aruns, the son of Lars Porsenna, was slain, whose tomb may still be seen on the spot, a noise like that which Livy mentions was heard among the surrounding hills.

But the most extraordinary of all the volcanic phenomena within the historical period was the sudden rising on two memorable occasions of the waters of the Alban Lake, which now lie deep down within the basin of an extinct crater. The first swallowed up the royal palace of Alba, and was so sudden and violent that neither the king nor any of his household had time to escape. The other occurred during the romantic siege of the Etruscan city of Veii, near Rome, by Camillus, four hundred years before Christ. The waters on that occasion rose two hundred and forty feet in the crater almost to the very edge, and threatened to overflow and inundate the surrounding country, when they were withdrawn by a subterranean canal cut in the rock, and poured into the Tiber by a connecting stream. This emissary, which may still be seen, was constructed owing to a hint given by an Etruscan soothsayer, that the city of Veii would not be captured till the Alban Lake was emptied into the sea. The deep winding cavern on the face of the Aventine Hill, said to have been inhabited by the monstrous giant Cacus, the son of Vulcan, who vomited fire, and was the terror of the surrounding inhabitants, was evidently of volcanic origin; and the local tradition from which Virgil concocted his fable was undoubtedly derived from a vivid recollection of the active operations of a volcano. When Evander, as described in the eighth Æneid, conducted his distinguished guest to the top of the Tarpeian Rock, in after ages so famous as the place of public execution, and composed of very hard lava, he assured him that an awful terror possessed the place, and that some unknown god had his abode there. The shepherds said it was Jupiter, and that they had often seen him kindling his lightnings and hurling his thunderbolts from thence. Evander then pointed to the ruined cities of Saturnia and Janiculum, on either side of the Tiber, whose destruction had been caused by the wrath of the god. There can be no doubt that this fable clothed with supernatural colouring some volcanic phenomena which had taken place on this spot during the human period. Even as late as three hundred and ninety years after the foundation of Rome, a chasm opened in the Forum, and emitted flames and pestilential vapours. An oracle declared that this chasm would not close until what constituted the glory of Rome should be cast into it. Marcus Curtius asked if anything in Rome was more precious than arms and valour; and arraying himself in his armour, and mounting on a horse splendidly equipped, he leapt in the presence of the Roman people into the abyss, when it instantly closed for ever. We thus see that the geology of the Roman plain throws no inconsiderable light upon the early history and traditions of the Eternal City, and brings within the cycle of natural phenomena what were long supposed to be purely fabulous incidents, the inventions of a poetic imagination. I have dwelt upon these geological incidents so fully, because nowhere does one realise the striking contrast between the shortness of man's existence on earth, as in places like the Roman plain, where the traces of cosmical energy have been greatest and most enduring.

The volcanic origin of the Roman Forum suggests the curious idea of the intimate connection of some of the greatest events of history with volcanic centres. Where the strife of nature has been fiercest, there by a strange coincidence the storm of human passion has been greatest. The geological history of a region is most frequently typical of its human history. We can predicate of a scene where the cosmical disturbance has been great,—where fire and flood have contended for the mastery, leaving the effects of their strife in deepening valleys and ascending hills,—that there man has had a strangely varied and eventful career. The strongholds and citadels of the earth, where the great battles of freedom and civilisation have been fought, were all untold ages previously the centres of violent plutonic disturbances. Edinburgh Castle, enthroned on its trap-rock, once the centre of a volcano, is associated with the most stirring and important events in the history of Scotland; Stirling Castle rises on its trap-rock erupted by volcanic action above a vast plain, across which a hundred battles have swept; Dumbarton Castle, crowning its trappean promontory, has represented in its civil history the protracted periods of earthquake and eruption concerned in the formation of its site; while standing in solitude amid the stormy waters of the Firth of Forth, the Bass Rock, once a scene of fiery confusion, of roaring waves and heaving earthquakes, has formed alternately the prison where religious liberty has been strangled, and the fortress where patriotism has taken its last stand against the forces of the invader. Palestine, Greece, Italy, Switzerland, and Scotland, the countries that have had the most remarkable history, and have done most to advance the human race, are distinguished above other countries for their geological convulsions and revolutions. The Roman Forum is thus but one specimen among numerous others of a law of Providence which has associated the strife of nature with the strife of man, and caused the ravages of the most terrible elements to prepare the way for the highest development of the human race.

Between the Roman Forum and the valley beneath Edinburgh Castle we can trace a striking resemblance, not only in their volcanic origin and the connection between their geological history and their analogous civil history, but also in the fact that they were both filled with small lakes. Between the ridges of the old and new town of Edinburgh, where the railway runs through Princes Street Gardens, there was in the memory of many now living a considerable collection of water called the North Loch. In like manner, in the hollow of the Roman Forum there was originally a small lake, a relic of the numerous lakes of the Campagna, which remained after the last elevation of the land, and which existed pretty far on into the human period. It was fed by three streams flowing from the Palatine, the Capitoline, and the Esquiline Hills, which now run underground and meet at this point.

Let us picture to ourselves the appearance of this lake embosomed in the hollow of its hills in the far-off pastoral times, when the mountains and the high table-lands of Italy were the chosen territory of those tribes whose property consisted chiefly in their flocks. The hills of Rome, whose elevation was far more conspicuous in ancient times than it is now, presented a precipitous front of dark volcanic rock to the lake. Their slopes were covered with grass and with natural copse-wood, intermixed with tall ilex trees, or umbrella pines; while on their summits were little villages surrounded with Cyclopean walls perched there not only for security, but also for the healthier air, just as we see at the present day all over Italy. On the summit of the Capitoline and Esquiline Hills were Sabine settlements, whose origin is lost in the mists of antiquity. To the green wooded slopes of the Palatine, according to a beautiful tradition, sixty years before the destruction of Troy, came Evander and his Arcadians from Greece, and settled there with their flocks and herds, and led a quiet idyllic life. According to another tradition, Æneas, after the destruction of Troy, came to this spot, and marrying the daughter of a neighbouring king, became the ancestor of the twins Romulus and Remus, the popular founders of Rome, whose romantic exposure and nourishment by a she-wolf are known to every schoolboy. Romulus, after slaying his brother, built a stronghold on the Palatine, which he opened as an asylum for outlaws and runaway slaves, who supported themselves chiefly by plunder. The community of this robber-city consisting almost entirely of males, they provided themselves with wives by the famous stratagem known as the "Rape of the Sabine women." Seizing the daughters of their neighbours, the Sabines of the Capitoline and Esquiline Hills, on a festive occasion, they carried them away with them to their fortress. A number of sanguinary fights took place in consequence of this rape around the swampy margin of the lake. In the last of these engagements the combatants were separated by the Sabine women suddenly rushing in with their children between their fathers and brothers and the men who had become their husbands. A mutual reconciliation then ensued, and the two communities contracted a firm and close alliance. The Palatine, Capitoline, and Esquiline villages became henceforth one city, to which from time to time by conquest new accessions were made, until at last all the different settlements on the seven hills of Rome were brought under one rule, and surrounded by a common wall of defence. Mommsen, Niebuhr, Sir George Cornewall Lewis, and other critics, have made sad havoc with these romantic stories of the origin of Rome. But although much of the fabulous undoubtedly mingles with them—for the early history of Rome was not written till it had become a powerful state, and then the historian had no records of days long past save what were embodied in popular tradition and poetry—there has recently been a reaction in favour of them, and they must ever be interesting on account of their own intrinsic charm, the element of truth which they contain, and the indelible associations of schoolboy life.

When a joint city was thus compacted and called Rome—possibly its old Pelasgic appellation—the first effort of the confederated settlements was to drain the geological lake in the centre of the city into the Tiber, a quarter of a mile distant. This they did by means of the celebrated Cloaca Maxima, a part of which may be seen open at the present day under the pavement of the Roman Forum, near the Temple of Castor and Pollux. This common sewer of Rome is one of its oldest and greatest relics. It was built by the first Tarquin, the fifth king of Rome, a century and a half after the foundation of the city; and although two thousand five hundred years have passed away since the architect formed without cement its massive archway of huge volcanic stones found on the spot, and during all the time it has been subjected to the shock of numerous earthquakes, inundations of the Tiber, and the crash of falling ruins, it still serves its original purpose as effectually as ever, and promises to stand for as many ages in the future as it has stood in the past. It is commonly said that we owe the invention of the arch to the Romans; and this work of undoubted Etruscan architecture is usually considered as among the very first applications of the principle. But the arched drains and doorways discovered by Layard at Nineveh prove that the Assyrians employed the arch centuries before Rome was founded. It had however only a subordinate place and a very limited application in the ancient architecture of the East; and it was left to the Romans to give it due prominence in crossing wide spaces, to make it "the bow of promise," the bridge over which they passed to the dominion of the world. The Cloaca Maxima is a tunnel roofed with two concentric rings of enormous stones, the innermost having an interior diameter of nearly fourteen feet, the height being about twelve feet. So capacious was it that Strabo mentions that a waggon loaded with hay might find room in it; and it is recorded that the Consul Agrippa passed through it in a boat. The mouth of the Cloaca opens into the Tiber, near the little round temple of Hercules in the Forum Boarium; but it is often invisible owing to the flooding of the river; and even when the Tiber is low, so much has its bed been silted up that only about three feet below the keystone of the sewer can be seen. Subsequently all the sewers of Rome were connected with it; and at the present day the nose gives infallible proof that it carries off a very large portion of the pollution of the modern city.

By the Cloaca Maxima, the valley between the Capitoline and Palatine Hills was for the first time made dry land; all indeed, except a small swamp which remained in one corner of it to a later age, and which the great sewer was not deep enough to drain entirely. Reeds grew around its margin, and boats were employed to cross it, as Ovid tells us. The name Velabrum—from an Etruscan root, signifying water, occurring in some other Italian names such as Velletri, Velino—still given to this locality, where a church stood in the middle ages called S. Silvestro in Lacu, commemorates the existence of the primeval lake; while the legend of the casting ashore of Romulus and Remus on the slope of the Palatine points to the gradual desiccation of the spot. On the level ground, recovered in this way from the waters, was formed the Roman Forum; the word Forum meaning simply an open space, surrounded by buildings and porticoes, which served the purpose of a market-place, a court of justice, or an exchange; for the Romans transacted more of their public and private business out of doors than the severe climate of our northern latitudes will permit us to do. On this common ground representatives of the separate communities located on the different hills of Rome, and comprehended and confederated within the walls of Servius Tullius, met together for the settlement of affairs that concerned them all. As Rome grew in importance, so did this central representative part of it grow with it, until at last, in the time of the Cæsars, it became the heart of the mighty empire, where its pulse beat loudest. There the fate of the world was discussed. There Cicero spoke, and Cæsar ruled, and Horace meditated. If the Temple of Jerusalem was the shrine of religion, the Forum of Rome was the shrine of law; and from thence has emanated that unrivalled system of jurisprudence which has formed the model of every nation since. Being thus the centre of the political power of the empire, the Roman Forum became also the focus of its architectural and civic splendour. It was crowded with marble temples, state buildings, and courts of law to such an extent that we wonder how there was room for them all within such a narrow area. Monuments of great men, statues of Greek sculpture, colonnades, and porticoes, rich with the spoils of subject kingdoms, adorned its sides. The whole region was resplendent with all the pomp and luxury of paganism in its proudest hour; the word "ambition," which came ultimately to signify all strivings for eminence, resolving itself into the elementary meaning of a walk round the Roman Forum, canvassing for votes at municipal elections.

Thus the Forum continued until the decay of the empire, when hordes of invaders buried its magnificence in ruins. At the beginning of the seventh century it must have been open and comparatively free from débris, as is proved by the fact that the column of Phocas, erected, at that time, stood on the original pavement. Virgil says, in his account of the romantic interview of Evander with Æneas on the spot which was to be afterwards Rome—then a quiet pastoral scene, green with grass, and covered with bushes—that they saw herds of cattle wandering over the Forum, and browsing on the rich pasture around the shores of its blue lake. Strange, the law of circularity, after the lapse of two thousand years, brought round the same state of things in that storied spot. During the middle ages the Roman Forum was known only as the Campo Vaccino, the field of cattle. It was a forlorn waste, with a few ruins scattered over it, and two formal rows of poplar-trees running down the middle of it, and wild-eyed buffaloes and mouse-coloured oxen from the Campagna wandering over the solitude, and cropping the grass and green weeds that grew in the very heart of old Rome. When Gibbon conceived the idea of the Decline and Fall of the Roman Empire, listening to the vespers of the Franciscan friars in the dim church of Ara Coeli in the neighbourhood, the Forum was an unsightly piece of ground, covered with rubbish-heaps, with only a pillar or two emerging from the general filth. When Byron stood beside the "nameless column with the buried base," commemorated in Childe Harold, he little dreamt what a rich collection of the relics of imperial times lay under his feet, as completely buried by the wrecks of ages as Pompeii and Herculaneum under the ashes and lava of Vesuvius. From fifteen to twenty feet of soil had accumulated over them.