At length, about the year 709, it was decreed that the rock should at once change its designation and its patron. To the clouds of Paganism, succeeded the sun of Christianity; and the original heathen appellation, _Tumba_, was replaced by one of the most elevated names of holy writ. St. Michael, "the chief of the angels and of the host of heaven, the protector of the Hebrew synagogue of yore, as now of the Catholic church, the conqueror of the old serpent, and the leader of souls to heaven," condescended to be worshipped here upon the western coast, as on Mount Garganus in the east, and with this view appeared to St. Aubert, then bishop of Avranches, commanding him to erect a church to his honor upon the mount. Another legend relates, how there had previously existed upon the same spot, a religious edifice, which had passed under the name of the _Monasterium ad duas Tumbas_, being equally appropriated to the adjoining rock of Tombeleine. However this may have been, it is admitted on all sides that a church was built, and that the hill knew thenceforth no other name than that of St. Michael's Mount; though Aubert, tardy in his belief, had refused to obey the injunction, till it had been repeated three several times, upon the last of which, the archangel touched the head of the saint, and left imprinted in his skull the marks of his fingers, which the author, here quoted, relates that he himself saw, to his great delight, in the years 1612 and 1641. To the miraculous vision, succeeded other occurrences of similar import. A tethered bull pointed out the spot where the holy edifice should be erected, and at the same time circumscribed its limits; a rock, that opposed the progress of the workmen, and was immoveable by human art, spontaneously withdrew at the touch of an infant's foot; and the earth opening, on being struck with St. Aubert's staff, gave birth to a spring of water, at once of the utmost use to the inhabitants, and gifted with the most sanative powers. At about the same period also, the sea ingulphed the neighboring forests,[214] insulating the rock; so that three messengers, who had been dispatched to Mount Garganus, thence to bring a portion of red cloth, the gift of St. Michael, together with a fragment of the stone on which he himself had sate, found on their return the aspect of things so changed, that "they thought they must have entered into a new world."