The mosaics which cover the cupolas, the altars of the various chapels, the pendentines, tympani, and other spaces, have been executed by mosaicists who were not the designers of the subjects.
This was the general practice in the Renaissance periods. One noteworthy exception to this rule may be noticed in the work of the artist Muziano de Brescia, who executed the mosaics of the Gregorian Chapel at St. Peter’s from his own designs, for which work he received the commission from Pope Gregory XIII. (1572-1585). Muziano was an imitator of Michelangelo, and is best known by his work in mosaic. As a rule the mosaics of St. Peter’s, like all those of the Renaissance period, are not to be compared for dignity and repose with those of the early Christian era, nor did they fulfil the true aim of monumental wall decoration, but sought rather to imitate as closely as possible the finish of oil or fresco painting. The “Transfiguration” after Raphael is not a success as a mosaic. It is believed to have been executed by Cristofari from a drawing enlarged from the original by Stefano Pozzi (1708-1768).
In the great cupola the mosaic has for its subject “The Eternal Father,” surrounded by cherubims. In other compartments are angels in adoration, cherubims, Jesus, Mary, John the Baptist, Paul, the twelve Apostles and their attributes. These mosaics are from designs by the Chevalier d’Arpin (1560-1640), and rank among the best works of their kind in St. Peter’s.
In the present century there has been some noted revivals of mosaic decoration in France and in England.
During the first thirty years of this century a royal manufactory was set up in Paris under the superintendence of Belloni, an Italian artist who came from the Pontifical atelier of Rome. Mosaic work of all kinds was executed at this studio, such as miniatures, pictures, and pietra-dura, or Florentine mosaic, for the encrusted decoration of furniture, as well as important works for pavements, which were designed in the classical style of the period. The principal work of Belloni is the pavement of the “Salle Melpomène” in the Louvre. It is a composition divided into five compartments, each having figure subjects, and has an extremely rich border of frets, foliage, and rosettes.
Some fine mosaics of a more recent date are the decorations of the foyer and other parts of the Grand Opera House in Paris, executed from the designs of M. Charles Garnier, the architect of the building, M. de Curzon, and others, by the mosaicists Salviati and Facchina of Venice.
The new cathedrals at Marseilles and Lyons have been recently decorated with mosaics more or less in the style of the Ravenna work of the fifth century, but the principal part of these works consists of ornamental compositions, such as doves with olive-branches, monograms, stars, and borders of romanesque ornament. Some still more recent work is the decoration of the apse of the Pantheon in Paris, from the designs of M. E. Hébert and the late M. Galland, who furnished the ornamental designs.
In England, during the present half of this century, there has[has] been several attempts to popularise mosaic decoration. Full-length figures of the chief ancient and modern sculptors, painters, and architects have been designed by Lord Leighton, Sir E. J. Poynter, E. Armitage, V. Prinsep, W. F. Yeames, F. W. Moody, and others; these have been executed in glass mosaic and in English ceramic mosaic, and form part of the decoration of the South Court in the Kensington Museum.
In the Houses of Parliament a mosaic has been executed from the design, “St. George,” by Sir E. J. Poynter; and other examples are the mosaics on the monument to Prince Albert designed by Sir Gilbert Scott.
But the most important efforts during the last few years are the mosaic decorations in St. Paul’s Cathedral.