The third chapel has over the altar the statue of our countrywoman, St. Helena, the mother of Constantine the Great; the work of Boggi, an excellent sculptor; and here is preserved a great piece of the pretended wood of the holy cross, which she is said to have first detected miraculously in the Holy Land. It was placed here by the late Pope with this inscription: "_Partem Crucis quam Helena Imperatrix è Calvario in Urbem adduxit, Urbanus VIII. Pont. Max. è Sissorianâ Basilicâ desumptam, additis arâ et statuâ, hìc in Vaticano collocavit_."
The fourth hath over the altar, and opposite to that of St. Veronica, the statue of St. Andrew, the work of Fiamingo, admirable above all the other; above is preserved the head of that Apostle, richly enchased. It is said that this excellent sculptor died mad to see his statue placed in a disadvantageous light by Bernini, the chief architect, who found himself outdone by this artist. The inscription over it is this:
"_St. Andreæ caput quod Pius II. ex Achaiâ in Vaticanum asportandum curavit, Urbanus VIII. novis hic ornamentis decoratum sacrisque statuæ ac Sacelli honoribus coli voluit._"
The relics showed and kept in this church are without number, as are also the precious vessels of gold, silver, and gems, with the vests and services to be seen in the Sacristy, which they showed us. Under the high altar is an ample grot inlaid with _pietra-commessa_, wherein half of the bodies of St. Peter and St. Paul are preserved; before hang divers great lamps of the richest plate, burning continually. About this and contiguous to the altar, runs a balustrade, in form of a theater, of black marble. Toward the left, as you go out of the church by the portico, a little beneath the high altar, is an old brass statue of St. Peter sitting, under the soles of whose feet many devout persons rub their heads, and touch their chaplets. This was formerly cast from a statue of Jupiter Capitolinus. In another place, stands a column grated about with iron, whereon they report that our Blessed Savior was often wont to lean as he preached in the Temple. In the work of the reliquary under the cupola there are eight wreathed columns brought from the Temple of Solomon. In another chapel, they showed us the chair of St. Peter, or, as they name it, the Apostolical Throne. But among all the chapels the one most glorious has for an altar-piece a Madonna bearing a dead Christ on her knees, in white marble, the work of Michael Angelo. At the upper end of the Cathedral, are several stately monuments, especially that of Urban VIII. Round the cupola, and in many other places in the church, are confession seats, for all languages, Hebrew, Greek, Latin, Spanish, Italian, French, English, Irish, Welsh, Sclavonian, Dutch, etc., as it is written on their friezes in golden capitals, and there are still at confessions some of all nations. Toward the lower end of the church, and on the side of a vast pillar sustaining a weighty roof, is the _depositum_ and statue of the Countess Matilda, a rare piece, with basso-relievos about it of white marble, the work of Bernini. Here are also those of Sextus IV. and Paulus III., etc. Among the exquisite pieces in this sumptuous fabric is that of the ship with St. Peter held up from sinking by our Savior; the emblems about it are the Mosaic of the famous Giotto, who restored and made it perfect after it had been defaced by the Barbarians. Nor is the pavement under the cupola to be passed over without observation, which with the rest of the body and walls of the whole church, are all inlaid with the richest of _pietra-commessa_, in the most splendid colors of polished marbles, agates, serpentine, porphyry, calcedon, etc., wholly incrusted to the very roof. Coming out by the portico at which we entered, we were shown the Porta Santa, never opened but at the year of jubilee. This glorious foundation hath belonging to it thirty canons, thirty-six beneficiates, twenty-eight clerks beneficed, with innumerable chaplains, etc., a Cardinal being always archpriest; the present Cardinal was Francisco Barberini, who also styled himself Protector of the English, to whom he was indeed very courteous.