If the unusual appearance of the cathedral is partly due to Wolsey's destruction, it is partly due also to its being used as a college chapel, and partly to the fact that in general plan, and to some extent in detail, it is Ethelred's design, commenced seventy years before the great developments of Norman architecture began. Ethelred himself probably only completed the choir and adjacent parts, and even there the work was very much altered in late Norman times; while the nave itself seems to be principally Norman (though built in imitation of Ethelred's work), with the exception of the pillars, which must be earlier than the Norman restoration, and may be of Saxon date, though we have no documentary clue as to what happened from the reign of Canute to that of Henry I., except that the church was, during the latter part of the time, in a very bad way. The following are Mr. Park Harrison's conclusions as to the general plan of the church, which he set before the British Archæological Association in 1892:--"The design of the building is clearly derived from the original pre-Norman church. The uniformity of plan throughout affords a remarkable instance of the way in which early church-builders imitated previous work, the process being, at Oxford, slow enough to make stages in the construction, that must have occupied instead of thirty years, as stated in the explanatory cards suspended in the cathedral, and quoted in some of the guide-books, at least 160. There were three changes in the profiles of the bases, and three in the abaci, all before the years 1170 or 1180." Thus the cathedral is a most important evidence of the high state of civilisation at which our Anglo-Saxon forefathers gradually arrived after the landing of St. Augustine. It is some satisfaction to our national pride to discover that they did not owe their culture to the Norman settlement, nor worship in wooden sheds before the arrival of the Conqueror, as was till recently supposed; but that the people who produced poets like Caedmon, artists like Dunstan, and scholars like Alfred and Bede, were also able to build churches worthy of such great names. More will be said about their workmanship when we come to discuss the capitals in the choir, but here we may refer the reader to a drawing in Mr. Harrison's pamphlet, "The Pre-Norman Date," of the apse of a church from the "Dunstan" MS., which shows at what elaborate architecture the Anglo-Saxons had arrived by the year 1000, and illustrates the curious foliage found on the cathedral capitals. =The Nave= was probably completed during the priorate of Robert of Cricklade (c. 1160-1180), the restoration being begun shortly after 1158, when the Pope's charter was secured. The clerestory, which is transitional, may therefore have been still unfinished at the time of his death.