.

[14] It contains the words PETRO LILLVTI PAVLO. They are surely
genuine and ancient. I examined them in company with Mommsen, Jordan,
and de Rossi, and they attributed them to the beginning of the third
century of our era. The best suggestion regarding their origin is that
they belong to a person, probably Christian, who used the name Petrus
as _gentilitium_, and Paulus as _cognomen_, and who was the son of
Lillutus, however barbaric this last name may sound.

[15] See de Rossi: _Bullettino di archeologia cristiana_, 1863, p.
49.--Rohault de Fleury: _L'arc de triomphe de Constantin_, in the
_Revue archeologique_, Sept. 1863, p. 250.--W. Henzen: _Bullettino
dell' Instituto_, 1863, p. 183.

[16] See Bibliography, p. 1. The title of the book may be translated
thus: _On the pagan and profane objects transferred to churches for
their use and adornment_.

[17] The two busts of S. Peter and S. Paul, described in Cancellieri's
book, _Memorie storiche delle sacre teste dei santi apostoli Pietro e
Paolo_, Roma, Ferretti, 1852 (second edition), were stolen by the
French revolutionists in 1799.

[18] See _Corpus Inscriptionum Latinarum_, part VI., No. 351.

[19] In the Byzantine period this church and the adjoining monastery
were called _casa Barbara patricia_. They are now comprised within the
cloisters of S. Antonio all' Esquilino, on the left side of S. Maria
Maggiore.

[20] These incrustations, and the basilica to which they belong, have
been illustrated by Ciampini: _Vetera monumenta_, vol. i. plates
xxii.-xxiv.--D'Agincourt: _Histoire de l'art, Peinture_, pl. xiii.
3.--Minutoli: _Ueber die Anfertigung und die Nutzanwendung der
faerbigen Glaeser bei den Alten_, pl. iv.--De Rossi: _La basilica di
Giunio Basso_, in the _Bullettino di archeologia cristiana_, 1871, p.
46.

[21] See Andrea Amoroso: _Le basiliche cristiane di Parenzo._ Parenzo,
Coana, 1891.--Mommsen: _Corpus Inscriptionum Latinarum_, vol. v. part
i. nos. 365-367.

[22] See Lovatelli: _I labirinti e il loro simbolismo nell' eta di
mezzo_, in the _Nuova Antologia_, 16 Agosto, 1890.--Arne: _Carrelages
emailles du moyen age_.--Eugene Muentz: _Etudes iconographiques et
archeologiques sur le moyen age_.

[23] See Pietro Pericoli: _Lo spedale di S. Maria della Consolazione_.
Imola Galeati, p. 64.

[24] Published in two volumes with the title: _Indicazione delle
immagini di Maria, collocate sulle mura esterne di Roma._ Ferretti,
1853.

[25] The inscript