A fresco of St. Peter, by Pierino del Vaga, in this church, was much admired by Vasari, who dilates upon the boldness of its design, the simple folds of its drapery, its careful drawing and judicious treatment.
Two streets lead from the Piazza S. Eustachio to—
The Pantheon, the most perfect pagan building in the city, built B.C. 27, by Marcus Agrippa, the bosom friend of Augustus Cæsar, and the second husband of his daughter Julia. The inscription in huge letters, perfectly legible from beneath, "M. AGRIPPA. L. F. COS. TERTIUM FECIT," records its construction. Another inscription on the architrave, now almost illegible, records its restoration under Septimius Severus and his son Caracalla, c. 202, who, "Pantheum vetustate corruptum cum omni cultu restitverunt." Some authorities have maintained that the Pantheon was originally only a vast hall in the baths of Agrippa, acknowledged remains of which exist at no great distance; but the name "Pantheum" was in use as early as A.D. 59.
In A.D. 399 the Pantheon was closed as a temple in obedience to a decree of the Emperor Honorius, and in 608 was consecrated as a Christian church by Pope Boniface IV., with the permission of the Emperor Phocas, under the title of Sta. Maria ad Martyres. To this dedication we owe the preservation of the main features of the building, though it had been terribly maltreated. In 663 the Emperor Constans, who had come to Rome with great pretence of devotion to its shrines and relics, and who only staid there twelve days, did not scruple, in spite of its religious dedication, to strip off the tiles of gilt bronze with which the roof was covered, and carry them off with him to Syracuse, where, upon his murder, a few years after, they fell into the hands of the Saracens. In 1087 it was used by the anti-pope Guibert as a fortress, whence he made incursions upon the lawful pope, Victor III., and his protector, the Countess Matilda. In 1101, another anti-pope, Sylvester IV., was elected here. Pope Martin V., after the return from Avignon, attempted the restoration of the Pantheon by clearing away the mass of miserable buildings in which it was encrusted, and his efforts were continued by Eugenius IV., but Urban VIII. (1623—44), though he spent 15,000 scudi upon the Pantheon, and added the two ugly campaniles, called in derision "the asses' ears," of their architect, Bernini, did not hesitate to plunder the gilt bronze ceiling of the portico, 450,250 lbs. in weight, to make the baldacchino of St. Peter's, and cannons for the Castle of S. Angelo. Benedict XIV. (1740—58) further despoiled the building by tearing away all the precious marbles which lined the attic, to ornament other buildings.
The Pantheon was not originally, as now, below the level of the piazza, but was approached by a flight of five steps. The portico, which is 110 feet long and 44 feet deep, is supported by sixteen grand Corinthian columns of oriental granite, 36 feet in height. The ancient bronze doors remain. On either side are niches, once occupied by colossal statues of Augustus and Agrippa.
"Agrippa wished to dedicate the Pantheon to Augustus, but he refused, and only allowed his statue to occupy a niche on the right of the peristyle, while that of Agrippa occupied the niche on the left."—Merivale.
The Interior is a rotunda, 143 feet in diameter, covered by a dome. It is only lighted by an aperture in the centre, 28 feet in diameter. Seven great niches around the walls once contained statues of different gods and goddesses, that of Jupiter being the central figure. All the surrounding columns are of giallo-antico, except four, which are of pavonazzetto, painted yellow. It is a proof of the great value and rarity of giallo-antico, that it was always impossible to obtain more to complete the set.
"L'intérieur du Panthéon, comme l'extérieur, est parfaitement conservé, et les édicules, placés dans le pourtour du temple forment les chapelles de l'église. Jamais la simplicité ne fut alliée à la grandeur dans une plus heureuse harmonie. Le jour, tombant d'en haut et glissant le long des colonnes et des parois de marbre, porte dans l'âme un sentiment de tranquillité sublime, et donne à tous les objets, dit Serlio, un air de beauté. Vue du dehors, la coupole de plomb qui a remplacé l'ancienne coupole de bronze couverte de tuiles dorées, fait bien comprendre l'expression de Virgile, lequel l'avait sous les yeux et peut-être en vue, quand il écrivait:
... 'Media testudine templi.'
En effet, cette coupole surbaissée ressemble tout à fait à la carapace d'une tortue."—Ampère, Emp. i. 342.