Few of the chapels that are to be seen now in the catacombs are in their original condition. As time went on, and Christianity became a corrupt and imperial religion, the simple truths which had sufficed for the first Christians were succeeded by doctrines less plain, but more adapted to touch cold and materialized imaginations, and to inflame dull hearts. The worship of saints began, and was promoted by the heads of the Church, who soon saw how it might be diverted to the purposes of personal and ecclesiastical aggrandizement. Consequently the martyrs were made into a hierarchy of saintly protectors of the strayed flock of Christ, and round their graves in the catacombs sprang up a harvest of tales, of visions, of miracles, and of superstitions. As the Church sank lower and lower, as the need of a heavenly advocate with God was more and more impressed upon the minds of the Christians of those days, the idea seems to have arisen that neighborhood of burial to the grave of some martyr might be an effectual way to secure the felicity of the soul. Consequently we find in these chapels that the later Christians, those perhaps of the fifth and sixth centuries, disregarding the original arrangements, and having lost all respect for the Art, and all reverence for the memorial pictures which made the walls precious, were often accustomed to cut out graves in the walls above and around the martyr's tomb, and as near as possible to it. The instances are numerous in which pictures of the highest interest have been thus ruthlessly defaced. No sacredness of subject could resist the force of the superstition; and we remember one instance where, in a picture of which the part that remains is of peculiar interest, the body of the Good Shepherd has been cut through for the grave of a child,--so that only the feet and a part of the head of the figure remain.