The Catacombs are now placed under the jurisdiction of the Roman Cardinal Vicar, assisted by a commission of sacred archæology appointed by the present pontiff. As far as the comparatively limited means at their command will allow, they zealously prosecute the excavation and exploration of this subterranean Rome with a systematic method which has already been attended with remarkable success, and which promises the most happy results in the future. From its crumbling ruins, paintings, decorations, and inscriptions of different ages, De Rossi reconstructs its history, often with the greatest minuteness and fidelity. His _Roma Sotterranea_[286] contains a general history of the Catacombs on the principle adopted in this volume, and a particular analysis of that of Callixtus, embodying his most important discoveries. The learned author is also publishing a complete collection of all the Christian inscriptions of the first seven centuries found in the vicinity of Rome. The first volume[287] contains all those with consular dates, which are invaluable as fixing 161 the chronology of the Catacombs and as evidences of doctrine, showing its gradual corruption in later times. De Rossi also edits a bimonthly journal--the _Bullettino di Archeologia Cristiana_--in which the new discoveries are announced. Dr. Maitland has the honour of being the first English writer on this subject, with the exception of the incidental allusions of travellers like Evelyn and Burnet. His admirable volume on the “Church in the Catacombs” is one of great interest, but having been written thirty years ago is quite out of date; and the recent discoveries of De Rossi and others have shown some of its conclusions, especially on the origin of the Catacombs, to be erroneous. His chapters on religious art and symbolism are of permanent value, and the theological bearing of these Christian evidences has been discussed with great candour and moderation.