Over the wall on the left of the Via Appia now hangs in profusion the rare yellow-berried ivy. Many curious plants are to be found on these old Roman walls. Their commonest parasite, the Pellitory—"herba parietina," calls to mind the nickname given to the Emperor Trajan in derision of his passion for inscribing his name upon the walls of Roman buildings which he had merely restored, as if he were their founder;[203] a passion in which the popes have since largely participated.
We now reach (on the right) the entrance of the Catacombs of St. Calixtus.
(The Catacombs (except those at S. Sebastiano) can only be visited in company of a guide. For most of the Catacombs it is necessary to obtain a permesso at the office of the Cardinal-Vicar, 70 Via della Scrofa, before 12 A.M.; upon which a day (generally Sunday) is fixed, which must be adhered to. The Catacombs of St. Calixtus are sometimes superficially shown without a special permesso. It may be well for the visitor to provide himself with tapers—cerini.)
All descriptions of dangers attending a visit to the Catacombs, if accompanied by a guide, and provided with "cerini," are quite imaginary. Neither does the visitor ever suffer from cold; the temperature of the Catacombs is mild and warm; the vaults are almost always dry, and the air pure.
"The Roman Catacombs—a name consecrated by long usage, but having no etymological meaning, and not a very determinate geographical one—are a vast labyrinth of galleries excavated in the bowels of the earth in the hills around the Eternal City; not in the hills on which the city itself was built, but in those beyond the walls. Their extent is enormous; not as to the amount of superficial soil which they underlie, for they rarely, if ever, pass beyond the third mile-stone from the city, but in the actual length of their galleries; for these are often excavated on various levels, or piani, three, four, or even five—one above the other; and they cross and recross one another, sometimes at short intervals, on each of these levels; so that, on the whole, there are certainly not less than 350 miles of them; that is to say, if stretched out in one continuous line, they would extend the whole length of Italy itself. The galleries are from two to four feet in width, and vary in height according to the nature of the rock in which they are dug. The walls on both sides are pierced with horizontal niches, like shelves in a bookcase or berths in a steamer, and every niche once contained one or more dead bodies. At various intervals this succession of shelves is interrupted for a moment, that room may be made for a doorway opening into a small chamber; and the walls of these chambers are generally pierced with graves in the same way as the galleries.
"These vast excavations once formed the ancient Christian cemeteries of Rome; they were begun in apostolic times, and continued to be used as burial-places of the faithful till the capture of the city by Alaric in the year 410. In the third century, the Roman Church numbered twenty-five or twenty-six of them, corresponding to the number of her titles, or parishes, within the city; and besides these, there are about twenty others, of smaller dimensions, isolated monuments of special martyrs, or belonging to this or that private family. Originally they all belonged to private families or individuals, the villas or gardens in which they were dug being the property of wealthy citizens who had embraced the faith of Christ, and devoted of their substance to His service. Hence their most ancient titles were taken merely from the names of their lawful owners, many of which still survive. Lucina, for example, who lived in the days of the Apostles, and others of the same family, or at least of the same name, who lived at various periods in the next two centuries; Priscilla, also a contemporary of the Apostles; Flavia Domitilla, niece of Vespasian; Commodilla, whose property lay on the Via Ostiensis; Cyriaca, on the Via Tiburtina; Pretextatus, on the Via Appia; Pontiano, on the Via Portuensis; and the Jordani, Maximus and Thraso, all on the Via Salaria Nova. These names are still attached to the various catacombs, because they were originally begun upon the land of those who bore them. Other catacombs are known by the names of those who presided over their formation, as that of St. Calixtus, on the Via Appia; or St. Mark, on the Via Ardeatina; or of the principal martyrs who were buried in them, as SS. Hermes, Basilla, Protus, and Hyacinthus, on the Via Salaria Vetus; or, lastly, by some peculiarity of their position, as ad Catacumbas on the Via Appia, and ad duas Lauros on the Via Labicana.
"It has always been agreed among men of learning who have had an opportunity of examining these excavations, that they were used exclusively by the Christians as places of burial and of holding religious assemblies. Modern research has now placed it beyond a doubt, that they were also originally designed for this purpose and for no other: that they were not deserted sand-pits (arenariæ) or quarries, adapted to Christian uses, but a development, with important modifications, of a form of sepulchre not altogether unknown even among the heathen families of Rome, and in common use among the Jews both in Rome and elsewhere.
"At first, the work of making the Catacombs was done openly, without let or hindrance, by the Christians; the entrances to them were public on the high-road or on the hill-side, and the galleries and chambers were freely decorated with paintings of a sacred character. But early in the third century, it became necessary to withdraw them as much as possible from the public eye; new and often difficult entrances were now effected in the recesses of deserted arenariæ, and even the liberty of Christian art was cramped and fettered, lest what was holy should fall under the profane gaze of the unbaptized.
"Each of these burial-places was called in ancient times either hypogæum, i. e. generically, a subterranean place, or cœmeterium, a sleeping-place, a new name of Christian origin which the pagans could only repeat, probably without understanding; sometimes also martyrium, or confessio (its Latin equivalent), to signify that it was the burial-place of martyrs or confessors of the faith. An ordinary grave was called locus or loculus, if it contained a single body; or bisomum, trisomum, or quadrisomum, if it contained two, three, or four. The graves were dug by fossores, and burial in them was called depositio. The galleries do not seem to have had any specific name; but the chambers were called cubicula. In most of these chambers, and sometimes also in the galleries themselves, one or more tombs are to be seen of a more elaborate kind; a long oblong chasse, like a sarcophagus, either hollowed out in the rock or built up of masonry, and closed by a heavy slab of marble lying horizontally on the top. The niche over tombs of this kind was of the same length as the grave, and generally vaulted in a semicircular form, whence they were called arcosolia. Sometimes, however, the niche retained the rectangular form, in which case there was no special name for it, but for distinction's sake we may be allowed to call it a table-tomb. Those of the arcosolia, which were also the tomb of martyrs, were used on the anniversaries of their deaths (Natalitia, or birthdays) as altars whereon the holy mysteries were celebrated; hence, whilst some of the cubicula were only family-vaults, others were chapels, or places of public assembly. It is probable that the holy mysteries were celebrated also in the private vaults, on the anniversaries of the deaths of their occupants; and each one was sufficiently large in itself for use on these private occasions; but in order that as many as possible might assist at the public celebrations, two, three, or even four of the cubicula were often made close together, all receiving light and air through one shaft or air-hole (luminare), pierced through the superincumbent soil up to the open air. In this way as many as a hundred persons might be collected in some parts of the catacombs to assist at the same act of public worship; whilst a still larger number might have been dispersed in the cubicula of neighbouring galleries, and received there the bread of life brought to them by the assistant priests and deacons. Indications of this arrangement are not only to be found in ancient ecclesiastical writings; they may still be seen in the very walls of the catacombs themselves, episcopal chairs, chairs for the presiding deacon or deaconess, and benches for the faithful, having formed part of the original design when the chambers were hewn out of the living rock, and still remaining where they were first made."—Roma Sotterranea, Northcote and Brownlow.
"To our classic associations, Rome was still, under Trajan and the Antonines, the city of the Cæsars, the metropolis of pagan idolatry—in the pages of her poets and historians we still linger among the triumphs of the Capitol, the shows of the Coliseum; or if we read of a Christian being dragged before the tribunal, or exposed to the beasts, we think of him as one of a scattered community, few in number, spiritless in action, and politically insignificant. But all this while there was living beneath the visible an invisible Rome—a population unheeded, unreckoned—thought of vaguely, vaguely spoken of, and with the familiarity and indifference that men feel who live on a volcano—yet a population strong-hearted, of quick impulses, nerved alike to suffer or to die, and in number, resolution, and physical force sufficient to have hurled their oppressors from the throne of the world, had they not deemed it their duty to kiss the rod, to love their enemies, to bless those that cursed them, and to submit, for their Redeemer's sake, to the 'powers that be.' Here, in these 'dens and caves of the earth,' they lived; here they died—a 'spectacle' in their lifetime 'to men and angels,' and in their death a 'triumph' to mankind—a triumph of which the echoes still float around the walls of Rome, and over the desolate Campagna, while those that once thrilled the Capitol are silenced, and the walls that returned them have long since crumbled into dust."—Lord Lindsay' s Christian Art, i. 4.