the center by Giovanni Battista Parodi, portraying the Miracle of the Chains (1706). In this scene, Pope Alexander heals the neck goiter of Saint Balbina by touching her with the chains that once bound St Peter. Michelangelo's Moses (completed in 1515), while originally intended as part of a massive 47-statue, free-standing funeral monument for Pope Julius II, became the centerpiece of the Pope's funeral monument and tomb in this, the church of della Rovere family. Moses is depicted with horns, connoting "the radiance of the Lord", due to the similarity in the Hebrew words for "beams of light" and "horns". This kind of iconographic symbolism was common in early sacred art, and for an artist horns are easier to sculpt than rays of light. Other works of art include two canvases of Saint Augustine and St. Margaret by Guercino, the monument of Cardinal Girolamo Agucchi designed by Domenichino, who is also the painter of a sacristy fresco depicting the Liberation of St. Peter (1604). The altarpiece on the first chapel to the left is a Deposition by Cristoforo Roncalli. The tomb of Cardinal Nicholas of Kues (d 1464), with its relief, Cardinal Nicholas before St Peter, is by Andrea Bregno. Painter and sculptor Antonio del Pollaiuolo is buried at the left side of the entrance. He is the Florentine sculptor who added the figures of Romulus and Remus to the sculpture of the Capitoline Wolf on the Capitol. The tomb monument of Cardinal Cinzio Aldobrandini was erected 1705–07 by prince Giovanni Battista Pamphili Aldobrandini to a design by his architect Carlo Francesco Bizzaccheri and with the sculptures of putti and a winged skeleton by Pierre Le Gros the Younger. In 1876 archeologists discovered the tombs of those once believed to be the seven Maccabean martyrs depicted in 2 Maccabees 7–41. It is highly unlikely that these are in fact the Jewish martyrs that had offered their lives in Jerusalem. They are remembered each year on 1 August, the same day as the miracle of the fusing of the two chains. The third altar in the left aisle holds a mosaic of Saint Sebastian from the seventh century. This mosaic is related to an outbreak of plague in Pavia, in northern Italy. The relics of Sebastian were taken there in order to stop a 680 outbreak of plague, since Sebastian was believed to have been born in Lombardy, and an altar