Stephen built nothing here, but Windsor is mentioned in the treaty of Wallingford as a fortress of importance. The name "Norman Tower," as given to one part of the pile, is erroneous, as the Norman keep is nothing more than earthworks surmounted by a wooden structure. The earliest date which can be assigned to any stone masonry which has been discovered at Windsor is the reign of Henry II. In the time of Henry II. the first mention of the castle is made in the Pipe Rolls. The outer wall of the south front of the upper ward remains, with the lower part of the king's gate, its hinges, and portcullis groove; the upper part was destroyed, and the whole concealed in other buildings by Wyatville, in the restoration works under George IV. In the reigns of Richard I. and John only necessary repairs were made. With Henry III. the history of the existing castle may be said to begin. The whole of the lower ward was then first built of stone, and many portions of the existing walls are found to be of that period. The Clewer Tower--now known as the Curfew Tower--remains almost unaltered, and exhibits in good condition a prison of the above period. The King's Hall is now the Chapter library, but the chambers of the King and Queen have been destroyed. Plans and drawings of them have been preserved; and the measurements agree with the orders of the kings, as recorded in the public rolls. Of the primitive chapel the north wall is still preserved; the galilee being now the east end (behind the altar) of St. George's Chapel. The doorways of the galilee are one of Henry III., the other of Edward III.; the west end of the chapel has been rebuilt several times. The arcade in the cloisters was protected by a wooden roof only. This chapel was completed by Edward III. and made into a lady-chapel, when the great St. George's Chapel was built. It was partly rebuilt by Henry VII. for the tomb of Lady Margaret, his mother, and afterwards was proposed for that of Henry VIII. It was much altered by James II. and partly restored by George IV. At the present time it is being made the object of devoted care, under the direction of Mr. Gilbert Scott. The roof has been vaulted in stone, the pattern of that of Henry VII. is being inlaid with mosaic work, and the windows filled with stained glass; and the edifice is to be a sepulchral chapel over the Royal vaults, in memory of the late Prince Consort. Mural paintings of kings' heads have been found of the date of Henry III. and Edward III., and are preserved in the cloister and galilee. During the reign of Edward I. the accounts show that the great works begun by Henry III. were carried on and completed; but no new works appear to have been undertaken. In the reign of Edward II. there were considerable sums expended on repairs of the walls, towers, and bridges, chiefly for timber and carpenters' work.