Page:The Atlantic Monthly Volume 1.djvu/522

514 These results are chiefly due to the labors of two Romans, one a priest and the other a layman, the Padre Marchi, and the Cavaliere de Rossi, who have devoted themselves with the utmost zeal and with great ability to the task of exploration. The present Pope, stimulated by the efforts of these scholars, established some years since a Commission of Sacred Archæology for the express purpose of forwarding the investigations in the catacombs; and the French government, soon after its military occupation of Rome, likewise established a commission for the purpose of conducting independent investigations in the same field.

The Roman catacombs consist for the most part of a subterranean labyrinth of passages, cut through the soft volcanic rock of the Campagna, so narrow as rarely to admit of two persons walking abreast easily, but here and there on either side opening into chambers of varying size and form. The walls of the passages, through their whole extent, are lined with narrow excavations, one above another, large enough to admit of a body being placed in each; and where they remain in their original condition, these excavations are closed in front by tiles, or by a slab of marble cemented to the rock, and in most cases bearing an inscription. Nor is the labyrinth composed of passages upon a single level only; frequently there are several stories, connected with each other by sloping ways.

There is no single circumstance, in relation to the catacombs, of more striking and at first sight perplexing character than their vast extent. About twenty different catacombs are now known and are more or less open, and a year is now hardly likely to pass without the discovery of a new one; for the original number of underground cemeteries, as ascertained from the early authorities, was nearly, if not quite, three times this number. It is but a very few years since the entrance to the famous catacomb of St. Callixtus, one of the most interesting of all, was found by the Cavaliere de Rossi; and it was only in the spring of 1855 that the buried church and catacomb of St. Alexander on the Nomentan Way were brought to light. Earthquakes, floods, and neglect have obliterated the openings of many of these ancient cemeteries, and the hollow soil of the Campagna is full "of hidden graves, which men walk over without knowing where they are."

Each of the twelve great highways which ran from the gates of Rome was bordered on either side, at a short distance from the city wall, by the hidden Christian cemeteries. The only one of the catacombs of which even a partial survey has been made is that of St. Agnes, of a portion of which the Padre Marchi published a map in 1845. "It is