Thomas of Bayeux, the first Norman archbishop, found everything at York in ruin and confusion. The minster and its outlying buildings, the library, and the university were destroyed, and only one of three canons remained in residence. He increased the number of these, and appointed a dean--there had not been one at York before--and otherwise changed the constitution of the minster. He further appointed a chancellor, or _magister scholarum_, in charge of all schools within ten miles of York. Among these was the Grammar School in the city, which still survives and flourishes, under the name of St. Peter's School. In the nave of the minster there is a window known as the Chancellor's Window, and containing a representation of Robert Riplingham, a chancellor of the fourteenth century, lecturing to his pupils. The library was never fully replaced. The books at the time of the Reformation were few, and were kept in a building close to the entrance to the south transept of the minster, and now used as the archbishop's registry. This building was erected in 1415. Most of these books are still preserved. In due course Thomas rebuilt the minster, or part of it, on a modest scale. In his episcopate the struggle for supremacy with Canterbury really began. Thomas refused to make submission to Lanfranc, Archbishop of Canterbury; but Lanfranc represented to the king that the supremacy of Canterbury was necessary as a bond of union between the south and the north. Thomas was at last compelled to submit to Lanfranc himself, though he made reservations with regard to his successors. In 1072 Worcester, and soon after Lindsey and Lincoln, were taken from the see of York. The abbeys of Selby and St. Oswald in Gloucester were given to the archbishop by way of some return. Meanwhile the archbishops of York also claimed supremacy over the northern bishops of the Isles and Scotland. They certainly visited and consecrated in these dioceses. After many quarrels, these pretensions were finally disposed of at Rome. In 1154 the sees of Man and Orkney were placed under the Archbishop of Drontheim, and in 1188 the whole Scottish Church was released from any subjection to York and placed under the direct control of the Pope. Only one Scottish prelate, the Bishop of Whithorn, remained a suffragan to York, but in the fourteenth century Whithorn also was lost to the archbishops, and became a part of the Scottish Church.