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Italy, Rome, St. Peter's Basilica | Decoration
Professor Dale Kinney

Decoration. The original ornamentation of St. Peter's comprised the marble columns and entablatures already described, and a great deal of gilding. Fourth- and fifth-century references to the church consistently mention its "shining," "gleaming" appearance, including descriptions written by Prudentius. Constantine's donations included—in addition to the inscribed gold cross weighing 150 pounds (49 kg.)—"shining gold-foil" to cover the apse; a silver-gilt, jewel-studded altar weighing 350 pounds; a golden chandelier with 50 dolphin-shaped lights that hung in front of the tomb of St. Peter; and 32 silver lamps in the nave as described in the Liber Pontificalis. Illumination was a luxury because of the cost of good oil to burn in the lamps, so the lights were endowed with a number of oil-producing properties in Syria and Egypt.

We must imagine the basilica at night, with the fire from the lamps flickering off the polished marble and metal surfaces, creating glimmering islands of illumination in the enormous space. Didactic narrative imagery would have been both hard to absorb and difficult to see in this setting, and it is generally thought to have been a later addition to the decor. A figural mosaic was set in the apse, possibly representing the Traditio legis: an image of Christ handing a scroll of authority to St. Peter, with St. Paul on the other side. The nave walls between the entablature and the windows were painted with two registers of scenes from the Old and New Testaments.



Italy, Rome, Old St. Peters, nave wall, drawing by Grimaldi


Italy, Rome, Old St. Peters, nave wall, drawing by Grimaldi


Italy, Rome, Old St. Peters, nave wall, drawing by Grimaldi
   
Around the middle of the fifth century Marinianus, a secular official (consul), and his wife Anastasia donated a huge mosaic to cover the upper part of the facade, depicting motifs from the Apocalypse: 24 Elders bearing crowns or wreaths, the four symbolic beasts, and the Lamb. The mosaic was still reasonably well preserved in the 11th century, when it was sketched in a manuscript preserved in Eton College in England.



Italy, Rome, Old St. Peters, façade represented in an 11th century manuscript, Eton College Library, MS 124, fol. 122r
   
   
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