The “Circlo Biblico,” or Biblical Cycle, of the Catacombs, as De Rossi has called it, partakes of the same symbolical character as their other art-creations. It has, for the most part, a twofold object: first, the literal presentation of certain historical events; and, second, a typical or allegorical reference to the spiritual truths of Christianity, especially to the cardinal doctrines of the sacrifice, resurrection, and ascension of Our Lord. The range of this art cycle comprehends the grand drama of redemption, from the fall of man to his restoration through the greater Man, Christ Jesus; with the careful avoidance, however, of the scenes of the passion, which are nowhere exhibited except under the veil of allegory or symbol. These numerous and varied biblical representations imply a remarkable familiarity of the primitive Christians with the holy scriptures, in striking contrast with the prevalent ignorance of these sacred books in the papal Rome of to-day. Indeed, these storied crypts must have been a grand illustrated gospel, impressing upon the mind of the believer the lessons of holy writ, and probably furnishing to the catechumens of the faith and recent converts from paganism a means of instruction in these sacred themes. The execution may often be coarse, and the drawing uncouth; but to the devout mind this primitive Christian art is invested with a profounder interest than all the triumphs of 283 genius in the galleries of the Vatican.[477] In consequence of its symbolical purpose this hieratic series is rather eclectic than cyclopædic in its character. Of the great variety of available topics, the number selected for art-presentation was comparatively limited; and the artist, in the treatment of these, frequently contented himself with the constant and unvaried reiteration of the same types, which were often of the rudest and most conventional form. “The incidents that exemplified the leading doctrines of the faith,” says Kugler,[478] “were chosen in preference to others.” Hence the very fixedness of these doctrines imparted somewhat of their own character to the pictorial representations employed.