APPENDIX 385 On the doors ofS. Sabina: P^rat^, Arch^ologie chr^tienne, p. 330; Kondakoff, Les Sculptures de la porte de Sainte- Sabine (Rev. Archeologique, 1877); Strzygowski, Das Ber- liner Moses-Kelief uud die Thiiren von Sta. Sabina in Rom, Jahrbuch der K. Preuss. Kunstsamm., Bd. 14, 1893; Berthier, La Porte de Sainte Sabine k Rome (1892) ; Garrucci, Vol. VI. The mosaics at Rome and Ravenna are discussed in all works treating of early christian art or archaeology. See, e.g.^ Gerspach, La Mosaique ; P^rat^, L'Archdologie chr^tienne ; Clausse, Basiliques et Mosaiques chrdtiennes (Paris, 1893) ; Kraus, Geschichte der christlichen Kunst ; Schultze, Arch'a- ologie der altchristlichen Kunst ; also the works of E. Miintz on the subject: Notes sur les mosaiques chrdtiennes de ritalie, in Revue Archeologique from 1874 on ; The Lost Mosaics of Rome, American Journal of Archaeology, 1890; La Mosaique chrdtienne pendant les premiers siecles, M^- moires de la Soci^td des Antiquaires de France, Vol. 2, Series VI (1892) ; J. P. Richter, Die Mosaiken von Ravenna; E. K. Redin, Die Mosaiken der Ravennatischen Kirchen. The best reproductions and most exhaustive discussion of the mosaics at Rome are in De Rossi's great work, Musaici cristiani (1876-1894); Garrucci, Storia del Arte Christiana, Vol. IV, contains the mosaics of both Rome and Ravenna ; La Revue de I'art chr^tienne for 1896 and 1897 has elaborate articles on the Ravenna mosaics by Barbier de Montault. On the^ mosaics and monuments of Palermo^ Monreale^ Ceph- alit : Clausse, Basiliques et Mosaiques chrdtiennes, II, pp 27- 131 ; Hittorff, Architecture Moderne de la Sicile (1835); G. de Marzo, Delle belle arti in Sicilia (1858) ; A. Dehli, Norman Monuments of Palermo and Environs (1892); Springer, Die raittelalterliche Kunst in Palermo (Bilder, aus der neueren Kunstgeschichte, 1886). For examples of fine Roman mosaica ornamenting pavements, said to be of the second century, see P. Gaukler, Les Mosaiques de I' Arsenal k Sousse, Revue Arch^logique, XXXI (1897). 2o
