Towards the end of the fifteenth century the Perpendicular style began to spread over the church. Besides the windows of the nave and north transept aisles, the clerestory of the choir was remodelled to carry the elaborate vaulting, which was probably also added in this century, and not by Wolsey as has been supposed, though the work may have been completed in his time. The similarity of the vaulting to that of the Divinity School in Oxford enables us to fix the date pretty accurately at 1480. Another characteristic feature of the church was made at this time, to wit, the fine chantrey tomb, called the Watching Chamber, but very probably the third and last "shrine" of the patron saint. The cloisters were also reconstructed, and, in order to make room for their eastern side, the western aisle of the south transept was destroyed. We are able to fix the date of the great north window of the north transept, and of the commencement of vaulting in its northern bay, because they were paid for out of a bequest of a monk, James Zouch, who died in 1503, and is buried under the window. One may conjecture that the whole of the church would have been vaulted in a style similar to that of the choir, if the dissolution of the priory had not come, and left this one bay as a pathetic little protest against the sweeping reconstructions of Cardinal Wolsey. Indeed Wolsey, who in 1524 created Christ Church as a college, did nothing but harm to Christ Church as a church. It used to be thought that he had thrown the vault over the choir, and even that he had built the palpably early English spire!--an idea which throws a curious light upon the architectural knowledge of our grandfathers. But, alas for his reputation, the only work connected with the church that can with certainty be attributed to him is the destruction of one half of the nave. For, in order to build the great quadrangle now known as "Tom Quad," he demolished its three western bays, and was apparently only prevented from carting away the whole church by his sudden fall from the royal favour in 1529. His scheme for "Cardinal College," as Christ Church was at first called, was one of extreme magnificence; and he began--much to the amusement of Oxford--with the splendid kitchen, still in daily use. Tom Quad gives one some idea of the scale on which he formed his plans: it, however, has never been properly finished, as it is too large and too much inhabited to be fit to receive the cloister for which it was designed. The real cloisters are of much more modest dimensions. Wolsey destroyed one side of them in order to build the college Hall.