 The pope's brief erecting the new bishopric was issued 21 November 1108, and on 17 October 1109 King Henry I granted his charter, the first bishop being Hervé le Breton, or Harvey (1109–1131), former Bishop of Bangor.The monastery church thus became one of the "conventual" cathedrals.Of this building the transepts and two bays of the nave already existed, and in 1170 the nave as it stands to-day (a complete and perfect specimen of late Norman work) was finished.