On the west is a covered corridor containing several ancient inscriptions. It is supported on one side by ancient spiral columns of pavonazzetto, on the other these have been plundered and replaced by granite. Hence, through a window, ladies are allowed to gaze upon the celebrated orange-tree, 665 years old, which they cannot approach; a rude figure of St. Dominic is sculptured upon the low wall which surrounds it. The west door, of the twelfth century, in a richly sculptured frame, is cited by Kugler as an instance of the extinction of the Byzantine influence upon art. Its panels are covered with carvings from the Old and New Testament, referred by Mamachi to the seventh, by Agincourt to the thirteenth century. Some of the subjects have been destroyed; among those which remain are the Annunciation, the Angels appearing to the Shepherds, the Angel and Zachariah in the Temple, the Magi, Moses turning the rods into serpents, the ascent of Elijah, Christ before Pilate, the denial of Peter, and the Ascension. Within the entrance are the only remains of the magnificent mosaic, erected in 431, under Celestine I., which entirely covered the west wall till the time of Sixtus V., consisting of an inscription in large letters, with a female figure on either side, that on the left bearing the name "Ecclesia cum circumcisione," that on the right, "Ecclesia ex gentibus." Among the parts destroyed were the four beasts typical of the Evangelists, and St. Peter and St. Paul. The church was thus gorgeously decorated, because in the time of the Savelli popes, it was what the Sistine is now, the Chiesa Apostolica. The nave is lined by twenty-four Corinthian columns of white marble, relics of the temple of Juno Regina, which once stood here. Above, is an inlaid frieze of pietradura, of A.D. 431, which once extended up to the windows, but was destroyed by Sixtus V., who at the same time built up the windows which till then existed over each pier. In the middle of the pavement near the altar, is a very curious mosaic figure over the grave of Munoz de Zamora, a General of the Dominican Order, who died in 1300. Nearer the west door are interesting incised slabs representing a German bishop and a lady, benefactors of this church, and (on the left) a slab with arms in mosaic, to a lady of the Savelli family. In the left aisle is another monument of 1312, commemorating a warrior of the imperial house of Germany. The high altar covers the remains of Sabina and Seraphia, Alexander the Pope, Eventius and Theodulus, all martyrs. In the chapel beneath St. Dominic is said to have flagellated himself three times nightly, "perché uno colpo solo non abbastava per mortificare la carne." At the end of the right aisle is the Chapel of the Rosary, where a beautiful picture of Sassoferrato, called "La Madonna del Rosario," commemorates the vision of St. Dominic on that spot, in which he received the rosary from the hands of the Virgin.