From this period, comparatively little was done for a century, when Edward IV. began to re-erect St. George's Chapel, nearly as we now see it; thereby adding, if not immediately to the castle itself, to the buildings within its precincts, one of extraordinary beauty and interest, as being in some respects the very finest specimen of the Perpendicular style and of ecclesiastical architecture in the kingdom. What adds, in some degree, to the interest of this edifice is, that the architects' names are preserved to us, it being known to be the work, first of Richard Beauchamp, Bishop of Salisbury; and, after his death, in 1481, it was completed by Sir Reginald Bray, who was also architect of Henry VII.'s Chapel. This sovereign intended to erect a mausoleum for himself at Windsor, and had begun to do so on the site of the original chapel built by Henry III.; but he abandoned the idea in favour of that at Westminster. Henry VII., however, added to the castle that building which is still called after him, and which is situated at the western extremity of the north side of the great quadrangle. Fortunately, this has been preserved, owing, perhaps, partly to its situation; for, although a mere "bit," it is a singularly fine one, and a noble specimen of palatial architecture, in that particular style.[27] The small tower at the south-west angle of the Royal apartments near the library, now called erroneously King John's Tower, is an octagonal building, and the two chambers in it have very good vaults, with the ribs meeting in a central boss, which is in both cases carved into the form of a rose. This enables this rose-tower and the rose-vaults to be identified in a very remarkable manner. The tower was very richly painted, and the quantity of paint and other materials charged on the roll misled the late Mr. Hudson Turner, who had only seen a portion of these accounts, and made him think they belonged to the great Round Tower, and that it was painted on the outside. The dates do not agree with this, and there is no evidence of external painting. The works which had been carried on during a great part of the long reign of Edward III. were not completed at the time of his death, and were continued under Richard II.; but with the exception of necessary repairs, the accounts for this reign relate chiefly to the offices and dependencies of the cattle, especially the mews for the falcons, which was evidently a large and important establishment not within the walls.