Of the other examples the oldest was the finest. This great basilica was erected in the reign of Constantine, close to the circus of Nero, where tradition affirmed that St. Peter had suffered martyrdom. It unfortunately was entirely swept away to make room for the greatest of Christian temples, which now occupies its site; but previous to its destruction careful measurements and drawings were made of every part, from which it is easy to understand all its arrangements—easier perhaps than if it had remained to the present day, and four centuries more of reform and improvements had assisted in altering and disfiguring its venerable frame.
As will be seen in the plan (Woodcut No. [396]), drawn to the usual scale, it possessed a noble atrium or forecourt, 212 ft. by 235, in front of which were some bold masses of building, which, during the Middle Ages, were surmounted by two belfry-towers. The church itself was 212 ft. in width by 380 in length, covering, without its adjuncts, an area of above 80,000 English feet, which, though less than half the size of the present cathedral, is as large as that covered by any mediæval cathedral except those of Milan and Seville. The central aisle was about 80 ft. across (about twice the average width of a Gothic nave), and nearly the same as that of the basilica of Maxentius and the principal halls of the greater thermæ. For some reason or other this dimension seems to have been a modulus very generally adopted. The bema or sanctuary, answering to the Gothic transept, extended beyond the walls of the church either way, which was unusual in early Christian buildings. The object here seems to have been to connect it with the tombs on its north side. The arrangement of the sanctuary was also peculiar, having been adorned with twelve pillars supporting a gallery. These, when symbolism became the fashion, were said to represent the twelve apostles. This certainly was not their original intent, as at first only six were put up—the others added afterwards. The sanctuary and choir were here singularly small and contracted, as if arranged before the clergy became so numerous as they afterwards were, and before the laity were excluded from this part of the church.
The general internal appearance of the building will be understood from the following woodcut (No. [397]), which presents at one view all the peculiarities of the basilican buildings. The pillars separating the central from the side aisles appear to have been of uniform dimensions, and to have supported a horizontal entablature, above which rose a double range of panels, each containing a picture—these panels thus taking the place of what was the triforium in Gothic churches. Over these was the clerestory, and again an ornamental belt gave sufficient elevation for the roof, which in this instance showed the naked construction. On the whole perhaps the ratio of height to width is unexceptionable, but the height over the pillars is so great that they are made to look utterly insignificant, which indeed is the great defect in the architectural design of these buildings, and, though seldom so offensive as here, is apparent in all. The ranges of columns dividing the side-aisles were joined by arches, which is a more common as well as a better arrangement, as it not only adds to the height of the pillars, but gives them an apparent power of bearing the superstructure. At some period during the Middle Ages the outer aisles were vaulted, and Gothic windows introduced into them. This change seems to have necessitated the closing of the intermediate range of clerestory windows, which probably was by no means conducive to the general architectural effect of the building.
397. View of the old Basilica of St. Peter, before its destruction in the 15th century. From Fontana.
Externally this basilica, like all those of its age, must have been singularly deficient in beauty or in architectural design. The sides were of plain unplastered brick, the windows were plain arch-headed openings. The front alone was ornamented, and this only with two ranges of windows somewhat larger than those at the sides, three in each tier, into which tracery was inserted at some later period, and between and above these, various figures and emblems were painted in fresco on stucco laid on the brickwork. The whole was surmounted by that singular coved cornice which seems to have been universal in Roman basilicas, though not found anywhere else that I am aware of.
The two most interesting adjuncts to this cathedral were the two tombs standing to the northward. According to the mediæval tradition the one was the tomb of Honorius and his wives, the other the church of St. Andrew. Their position, however, carefully centred on the spina of the circus of Nero, where the great apostle suffered martyrdom, seems to point to a holier and more important origin. My own conviction is that they were erected to mark the places where the apostle and his companions suffered. It is besides extremely improbable that after the erection of the basilica an emperor should choose the centre of a circus for the burying-place of himself and his family, or that he should be permitted to choose so hallowed a spot. They are of exactly the usual tomb-form of the age of Constantine, and of the largest size, being each 100 ft. in diameter.
The first was destroyed by Michael Angelo, as it stood on the site required for his northern tribune, the second by Pius VI., in 1776, to make way for the present sacristy, and Rome thus lost, through pure carelessness, the two oldest and most sacred edifices of the Christian period which she possessed.
The most eastern had been so altered and overlaid, having been long used as a sacristy,[[266]] that it might have been difficult to restore it; but its position and its antiquity certainly entitled it to a better fate.