Raphael also had the oversight of all the excavations in and around Rome, so that pieces of antique statuary, which were often found, might be carefully preserved. "To this end," wrote Leo X., "I command every one, of whatever condition or rank he may be, noble or not, titled or of low estate, to make you, as superintendent of this matter, acquainted with every stone or marble which shall be discovered within the extent of country designated by me, who desire that every one failing to do so shall be judged by you, and fined from one hundred to three hundred gold crowns." The third hall of the pope, called the Stanza del Incendio, was painted from 1514 to 1517. The first fresco is "The Oath of Leo III.," who, brought before the Emperor Charlemagne for trial, was acquitted through a supernatural voice proclaiming that no one had the right to judge the pope. The second fresco is "The Coronation of Charlemagne by Leo III.," thus signifying that the spiritual power is above the temporal power. The two principal portraits are, however, Leo X. and Francis I., who formed an alliance in 1515. The third and finest picture is "The Conflagration of the Borgo Vecchio at Rome." The other pictures were executed in part by the pupils of Raphael. This was by his own hand. In 847 a fire broke out in Rome, which extended from the Vatican to the Mausoleum of Adrian. The danger from the high wind was very great, when Pope Leo IV. implored divine aid, and at once the flames assumed the form of a cross, and the fire was quenched. "Several of the figures," says Passavant, "are considered as perfect and inimitable, amongst others the two beautiful and powerful women who are bringing water in vases, and whose forms are so admirably delineated under their garments agitated by the wind." The last fresco shows the "Victory of Leo IV. over the Saracens at Ostia." The pope, Leo IV., with the face of Leo X., is on the shore, engaged in prayer. At this time Raphael made sepia sketches for the Loggie leading to the apartments of the pope; thirteen arcades, each arcade containing four principal pictures. Forty-eight of these scenes are taken from the Old Testament, and four from the life of Christ. Taken together, they are called "Raphael's Bible." Vasari said of the decorations in the Loggie, "It is impossible to execute or to conceive a more exquisite work." Catherine II. of Russia had all these Loggie paintings copied on canvas, and placed in the Hermitage, in a gallery constructed for them, like that in the Vatican. This gallery cost a million and a half of dollars.