The chair which was originally assigned as that of S. Peter was eventually passed on from one chapel to another, till, it is said, that, when Rome was sacked by the imperialists in 1527, they stripped it of its ornaments and covering, for the sake of their value; and that beneath they found an old carved wooden chair, with the inscription, "_There is only one God, and Mohammed is his prophet_"--which same formula is engraved upon the back of the marble episcopal chair in the Church of S. Pietro in Castello at Venice. In 1558, the feast of the chair of S. Peter was fixed in Rome for the 18th of January, and in Antioch for February 22nd; and in 1655 Pope Alexander VII. placed this chair where it now stands. The present chair is medieval, ninth century, and is unlike early representations in art of the chair used by the Apostle Paul, which we may look upon as episcopal. The ivory diptych of St. Paul (A.D. 400), the property of Mr. Carrand of Lyons, engraved by the Arundel Society, represents Paul seated on a chair, holding in his left hand a roll, the symbol of apostleship, whilst the right hand is raised in the act of blessing Linus, who carries a book in his hand. At the back of the chair is S. Mark, holding a roll in his left hand. The chair is light, and not unlike a modern library one in shape. Later art agrees with the present chair. A fresco at S. Clement's, Rome (1050), represents Peter installing Clement into the Papal chair--a chair, so far as can be seen, not unlike the present one of S. Peter, which was made after the coronation of Charlemagne as Emperor of the Holy Roman Empire (A.D. 800). Upon our right is the tomb of Urban VIII. His bronze statue is by Bernini, with Justice and Charity in marble. On our left is Della Porta's monument to Paul III.; likewise a bronze figure, with Prudence (the Pope's mother, Giovanna Gaetani) and Justice (his sister, Giulia Farnese). Justice is a beautiful figure, but the tin drapery put on to cover its nakedness by Bernini destroys its beauty. It is necessary to re-paint the tin every now and then. There is a deal of this mock modesty in S. Peter's. Turning into the south aisle, on our right, is the tomb of Alexander VIII. The bronze statue is by Arrigo, and the figures of Religion and Prudence by Rossi. The relief represents the Pope canonizing five saints. Opposite is the mosaic of S. Peter at the Gate of the Temple. It is said that this scene, here represented, gave to President Lincoln the idea for his proposed motto for the greenbacks. When the commission applied to him for a motto to put upon the notes, he said, "I can think of nothing better than what Peter said to the sick man at the gate of the temple--'Silver and gold have I none, but what I have that give I unto thee.'"