r S. Peter's, 146.

Military inscriptions from the Praetorian camp, 351.

Military service of Christians under the Roman Empire, 18.

Minerva in Christian art, 25;
honored as a restorer of hair, 63.

Monastery of S. Alessio, 235;
of S. Andrew, 229, 230 (cut).

Monte Mario, 165.

Monte Testaccio, 181.

Mosaics, in church of S. Paolo alle Tre Fontane, 25;
in church of S. Andrea, 29 (cut);
in church of S. Pudentiana, 113;
in S. Peter's, 139.

_Mundus muliebris_, 204.

Museo delle Terme, 268.

Museums. See _Capitoline_, _Lateran_, _Vatican_;
also _dei Conservatori_, under _Palaces_.

Music, religious, school of, established by Gregory, 229.

Naples, church of the Olivetans, 25.

Nemi, the site of a temple of Diana, 60 (cut).

Neptunium. See _Temple of Neptune_, 99.

Nereus and Achilleus, martyrs, 337.

Nero, 127, 287;
relation to Christianity, 11;
deserted by the legions, 185;
head of, 186 (cut);
his flight and death, 187;
his funeral, 189;
his tomb, 189.

Nerva, 177.

Nicomachus Flavianus, attempt to restore paganism, 97.

Oaths, 105.

Obelisks, discovered in Rome, 92, 97, 172;
of Rameses the Great, discovered in 1883, 95.

Oils, 218.

Oratories, private, of the early Christians, 109.

Orientation of churches, 120, 152.

Orpheus, in Christian art, 23 (cut).

Ossaria, 256.

Ostia, imperial palace at, 25;
granary at, 47 (cut).

Otho II., his tomb, 136.

Pacuvius, 69.

Paetus, Lucilius, tomb of, 283.

Pagan rites and customs adopted by the Church, 23.

Paintings, fresco in S. Clemente, translation of Cyril's remains,
32 (plate);
in a patrician house in the Farnesina gardens, 263, 264 (plate),
265 (cut);
in the Catacombs, discovered in 1714, 330;
in the Villa Amaranthiana, 335;
of the Saviour with SS. Paul and Peter in the Catacomb ad Duas
Lauros, 356;
of the story of Jonah and the Symbolic Supper, 356, 357 (cut);
illustrations of the Gospel in the Catacombs, 358;
battle between Constantine and Maxentius, _frontispiece_.

Palaces: Albani del Drago, 30;
Altieri, 101;
Caffarelli, 85;
dei Conservatori, 30, 53, 77, 100, 185 (see also
_Capitoline museum_);
Farnese, 100;
Fiano, 82;
Lateran (see _Lateran_);
Maraini, 280;
Moroni, 88;
Odescalchi, 100.

Pammachius, 158.

Pantheon, 56.

Parenzo, Dalmatia, basilica of, 30.

Paschal I., Pope, 326.

Passion-plays in Rome, 181.

Paul, the